a2) United States Patent
`US 6,287,167 B1
`(10) Patent No.:
`Sep. 11, 2001
`(45) Date of Patent:
`Kondo
`
`US006287167B1
`
`(54)
`
`DRIVING CIRCUIT FOR TOY CAR
`
`(75)
`
`Inventor: Hirotoshi Kondo, Tokyo (JP)
`
`(73)
`
`Assignee: Kondo kagaku Co., Ltd., Tokyo (JP)
`
`GF)
`
`Notice:
`
`Subject to any disclaimer, the term ofthis
`patent
`is extended or adjusted under 35
`U.S.C, 154(b) by 0 days.
`
`(21)
`
`(22)
`
`(30)
`
`Aug.
`
`(51)
`(52)
`
`(58)
`
`(56)
`
`Appl. No.: 09/370,704
`
`Filed:
`
`Aug. 9, 1999
`
`Foreign Application Priority Data
`CO: F9G8
`CPS sciccsstecccsccsccnsrecrensccassronavesevenans 10-236593
`
`Int. Cl.’
`.. A63H 30/00; A63H 30/04
`US. Cle ceccccssssesssssssssseeees 446/454; 446/456; 446/484;
`463/62
`Field of Search ........cccccccccscceseeseresee 446/454, 456,
`446/457, 461, 462, 484; 463/6, 62
`
`References Cited
`
`3,705,387 * 12/1972 Stern et al. we 446/454 X
`4,080,602 *
`3/1978 Hattori etal. we 440/454 X
`3/1979 Hansen el al. c..cscsecseceaes 446/454 X
`4,143,307 *
`
`6/1981 Mabuchi et al.
`.
`. 446/456 X
`4,275,394 *
`9/1982 Tsukuda oo... 446/484
`4,349,986 *
`
`
`4,548,584 * 10/1985 Townsend... 446/454
`4,712,184 * 12/1987 Haugerud 2.0... 446/454 X
`
`* cited by examiner
`
`Primary Examiner—). Neal Muir
`(74) Attorney, Agent, or Firm—Dilworth & Barrese LLP.
`
`(57)
`
`ABSTRACT
`
`The invention relates to a speed controller able to change a
`pulse frequency and a pulse width of a pulse signal to control
`a driving motor. This device is able to change the pulse
`frequency during the run of the toy car which adjusts the
`torque of the driving motor in response to the revolution
`number ofthe driving motor. The speed controller adjusts
`the pulse frequency to be large when the pulse width is
`small, while the pulse frequency is small when the pulse
`width is large.
`
`20 Claims, 6 Drawing Sheets
`
`1
`
`Mattel Ex. 2004
`Mattel Ex. 2004
`Dynacraft v. Mattel
`Dynacraft v. Mattel
`IPR2018-00038
`IPR2018-00038
`
`U.S. PATENT DOCUMENTS
`
`cv.eccccctceseeteneees 446/456 X%
`
`3/1971
`
`Lemon, Jr.
`
`3,569,969 *
`
`P1(1/f1)
`
`Pw
`
`P8
`
`

`

`U.S. Patent
`
`Sep. 11, 2001
`
`Sheet 1 of 6
`
`US 6,287,167 BI
`
`1
`
`
`
`FIG.
`
`17
`
`
`
`2
`
`

`

`U.S. Patent
`
`Sep. 11, 2001
`
`Sheet 2 of 6
`
`US 6,287,167 B1
`
`P1(1/f1)
`
`Pw
`
`TL LL
`
`P4
`
`Pw4
`
`P8
`Pw8
`
`3
`
`

`

`U.S. Patent
`
`Sep. 11, 2001
`
`Sheet 3 of 6
`
`US 6,287,167 B1
`
`PULSE
`FREQUENCY
`
`P1
`
`T10
`
` P104--
`TORQUE 1""
`
`ri
`
`THROTTLE OPEN DEGREE
`
`r10
`
`FIG. 4
`
`THROTTLE OPEN DEGREE
`
`FIG. 5
`
`4
`
`

`

`U.S. Patent
`
`Sep. 11, 2001
`
`Sheet 4 of 6
`
`US 6,287,167 B1
`
`STEP 1
`
`
`
`STEP 2
`
`STEP 3
`
`STEP 4
`
`
`
` WHETHER INPUTS DATA
`
`REWRITES DATA
`
`|
`INSTRUCTION INPUT
`OF REVOLUTION NUMBER
`
`!
`PULSE FREQUENCY SETTING
`FROM DATA IN CPU
`
`STEP 5
`
`|
`
`PULSE WIDTH SETTING
`
`STEP 6
`
`STEP 7
`
`OUTPUTTING PULSE SIGNAL
`
`DRIVING MOTOR
`ROTATION
`
`O
`
`FIG. 6
`
`5
`
`

`

`U.S. Patent
`
`Sep. 11, 2001
`
`Sheet 5 of 6
`
`US 6,287,167 B1
`
`P(1/f)Ci
`(PRIOR ART)LLILL
`
`FIG. Za
`
`=
`worm|LfLfLyL(PRIOR ART)
`
`6
`
`

`

`U.S. Patent
`
`Sep. 11, 2001
`
`Sheet 6 of 6
`
`US 6,287,167 B1
`
`p
`
`PULSE
`FREQUENCY
`
`
`
`SMALL
`
`
`
`LARGE
`
`THROTTLE OPEN DEGREE
`
`FIG. 8
`(PRIOR ART)
`
`TORQUE
`
`1
`
`SMALL
`
` LARGE
`
`THROTTLE OPEN DEGREE
`
`FIG. 9
`(PRIOR ART)
`
`7
`
`

`

`US 6,287,167 B1
`
`1
`DRIVING CIRCUIT FOR TOY CAR
`
`BACKGROUND OF THE INVENTION
`
`1. Field of the Invention
`
`This invention relates to a driving circuit for toy car, and
`more particularly a drive circuit to control a driving motor
`based on a throttle open signal from a transmitter.
`2. Description of the Prior Art
`Whenthe toy car is run by a remote control operation in
`a circuit, an operator should control a car speedofthe toy car
`in response to a curved course and/or a straight course.
`When the car speed is controlled, a throttle open degree
`control lever of a transmitter is operated to change a revo-
`lution numberof the driving motor mounted on the toy car.
`It is requested to change a pulse width of a pulse signal
`which drives the driving motor.
`For example, when the car speed is lowered when the toy
`car curves, a pulse width PW of the pulse signalis lessened,
`as shown in FIG. 7(a) thereby lowering the revolution
`number of the driving motor. On the other hand, when the
`speed ofthe car is raised to run the straight course, its pulse
`width PW of the pulse signal, as shown in FIG. 7(b) is
`enlarged, to raise the revolution numberofthe driving motor
`time, a pulse frequency P(1/f frequency) of the pulse signal
`is not changed but kept constant.
`To this end, each circuit on which the toy car runs, a
`course lay-out andsize ofa course vary, and construction of
`the toy car body varies.
`For example,
`there are often opportunities to use the
`driving motor of wheels, at a low speed revolution, thereby
`raising a torque at a low speed revolution high, to be able to
`run the curve course forcibly.
`there are often
`In a straight course with less curves,
`opportunities to use the driving motor of the wheels at high
`speed; it is required to smoothly rotate the motorto raise a
`revolution efficiency of the motor at high.
`For this reason, whenthe toy car is run on a curved course,
`the pulse frequency Pof the pulse signal to drive the driving
`motor is preset at high (see solid line gl in FIG. 8) to raise
`torque at a low speed revolution (seesolid line g1 in FIG, 9),
`On the other hand,for relatively straight course with few
`curves for the car drive, the pulse frequency P of the pulse
`signal to drive the driving motor is preset low, prior to a run
`ofthe car (see dotted line g2 in FIG. 8 graph), to smoothly
`rotate the motor, to raise revolution efficiency (see dotted
`line g2 in FIG. 9 graph).
`Thus, the driving circuit in the prior art is pre-changed at
`its pulse frequency to meet the course. When the car is run
`on the curved course, for example,it is difficult to attain high
`revolution efficiency with smooth revolution of the motor,
`on the straight course.
`On the other hand, when the car is run on the straight
`course, it is difficult to raise the torque on the curved course.
`
`SUMMARY OF THE INVENTION
`
`This invention providesa driving circuit for the toy car to
`enable raising the driving motor torque for runs on a curved
`course to achieve a forceful run, while on the run on the
`straight course, the driving motor is smoothly rotated to raise
`the efficiency of revolution. Thus, all the drawbacks in the
`prior art are overcome. To achieve said object of this
`invention, it has a speed controller in the drive circuit to
`control the revolution number ofthe driving motor on the
`toy car for run of the toy car, said speed controller being able
`
`15
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`2
`to change the pulse frequency and the pulse width of the
`pulse signal to control the driving motor.
`The above driving circuit of this invention has a speed
`controller by which the pulse frequency and the pulse width
`of the pulse signal are changed.
`Thus,
`this invention achieves a change of the pulse
`frequency driving a run ofthe toy car. Then, the torque of the
`driving motor is adjustable in response to the revolution
`number of the driving motor and the smooth rotation of the
`driving motor in response to the revolution number of the
`driving motor is achieved. In a preferred embodiment the
`speed controller enlarges the pulse frequency when the pulse
`width is lowered, while lowering the pulse frequency when
`the pulse width is enlarged.
`While at a low speed revolution ofthe driving motor, and
`the pulse frequency of the pulse signal is enlarged, and the
`pulse frequency of the pulse signal
`is lowered when the
`driving motor rotates at a high speed. For this reason,as the
`driving motor torque can be enlarged when thetoy car is run
`on a curved course, the toy car can be forcefully run on a
`curved course. To the contrary, when running on the straight
`course, the driving motor is smoothly rotated, so that the
`revolution efficiency of the driving motor is raised.
`
`BRIEF DESCRIPTION OF THE
`ACCOMPANYING DRAWINGS
`
`FIG. 1 is a general view showing a toy car unit operated
`by remote control, of this invention;
`FIG, 2 is a block diagram showing a control meansof the
`toy car of this invention;
`FIG, 3 is a explanatory view of the pulse signal, trans-
`mitted to the driving motor from a speed controller, of this
`invention;
`FIG, 4 is a graph showing a relation of a throttle open
`degree and a pulse frequency, of this invention;
`FIG. 5 is a graph showinga relation of the throttle open
`degree and torque, of this invention;
`FIG. 6 is a flow chart explaining function of the driving
`circuit, of this invention;
`FIG, 7 is an explanatory view of the pulse signal trans-
`mitted to a prior art driving motor;
`FIG. 8 is a graph showing a relation of throttle open
`degree and pulse frequency, of the prior art; and
`FIG. 9 is a graph showinga relation ofthe throttle open
`degree and the torque, of the prior art.
`
`DESCRIPTION OF THE PREFERRED
`EMBODIMENTS
`
`Now,the preferred embodimentsofthis invention will be
`hereinafter discussed with reference to the accompanying
`drawings.
`FIG. 1 is a general view showinga toy car unit for remote
`operation of this invention, FIG, 2 is a block diagram
`showing a control means of the toy car ofthis invention.
`FIG, 3 is an explanatory view ofa pulse signal transmitted
`to a driving motor from a speed controller of this invention.
`FIG, 4 isa graph showinga relation of a throttle open degree
`and a pulse frequency of this invention. FIG. 5 is a graph
`showing a throttle open degree and a torque ofthis inven-
`tion. FIG. 6 is a flow chart explaining a function of a driving
`circuit of the toy car of this invention. As shownin FIG. 1,
`the toy car unit 1 for the remote operation comprises a main
`body 5 in a toy car shape having front wheels 2 and rear
`wheels 3, a control means 10 driving the rear wheels 3 of the
`
`8
`
`

`

`US 6,287,167 B1
`
`3
`4
`In FIG. 4, a solid line g3 shows a relation of the pulse
`main body 5, and a transmitter 20 to transmit a running
`frequency and the throttle open degree, of this invention,
`signal to the control means LO.
`while a dotted line g4 shows a pulse frequency andathrottle
`Numeral 20a is a control lever to adjust the throttle open
`open degree, of the prior art.
`degree at the transmitter 20.
`The solid line g3 shows that the pulse frequency pl-10
`As shown in FIG. 2, the control means 10 comprises a
`changes in response to the throttle open degree rl—r10. In
`receiver 12 to receive a running signal from the transmitter
`other words, when the throttle open degree becomes small
`20, a driving circuit 14 to a feed speed control signal based
`from rl0 to rl, the pulse frequency becomeslarge from pl
`on the running signal receiver at the receiver 12, a driving
`to pl0.
`motor 16 driven by a pulse signal (speed controlsignal) from
`this driving circuit 14, and a gear member 18 to transmit a
`Onthe other hand, whenthe throttle open degree becomes
`revolutionary force of the driving motor 16 to the rear
`large from rl to rl0, the pulse frequency becomes small
`wheels 3. Numeral 22 is a power source. Now, the speed
`from p10 to pl. In the prior art,
`the pulse frequency is
`controller 15 is explained based on Table 1. The driving
`constant with no change, even when the throttle open degree
`circuit 14 has the speed controller 15 in which data shown
`changes from rl1—r10.
`in the Table 1 has been input. This data is set in 10 steps of
`FIG. 5 shows a relation of the torque (TI—T10) of the
`the frequency in f1-f10 of the pulse signal (speed control
`driving motor and the revolution number of the driving
`signal)
`to control
`the driving motor 16, with setting a
`motor which is the throttle open degree (rl-r10) of the
`revolution number (the throttle open degree of the control
`throttle lever, based on the data in the Table 1.
`lever) of the driving motor 16 and matching to the revolution
`Here, the torque (TI—T10) is shownina vertical axis and
`number rl—r10 ofthe driving motor 16.
`the throttle open degree (rl—r10) on an abscissa. In FIG, 5,
`in f1:300 Hz,
`For example,
`those frequencies are set
`the solid line g3 showsthe torque curve of this invention,
`£2:400 Hz, {3:500 Hz, f4:600 Hz, £5:700 Hz, £6:800 Hz,
`while the dotted line g4 showsthe torque curve in the prior
`£7:900 Hz, 8:1 KHz, f9:1.5 KHz and {10:2 KHz.
`art.
`When frequency is set at
`the frequency [1(300 Hz), a
`pulse width pwl
`is adjustably set at 0O-10%of the pulse
`frequency pl (1/f1). When the frequency £2 (400 Hz)is set,
`the pulse width pw2 is adjustably set at 10-20% of the pulse
`frequency (1/f2); when frequency is set at the frequency [3
`(500 Hz), the pulse width pw3 is adjustably set at 20-30%
`of the pulse frequency p3 (1/13).
`the frequency
`Additionally, when frequency is set at
`£4(600Hz), the pulse width pw4is adjustably set at 30-40%
`ofthe pulse frequency 4 (1/f4), and when frequencyis set at
`the frequency £5 (700 Hz), the pulse width pwS is adjustably
`set at 40-50% of the pulse frequency p5 (1/f5). When
`frequency is set at the frequency [6 (800 Hz), the pulse width
`pwé6 is adjustably set at 50-60%ofthe pulse frequency p6
`(1/f6). When frequencyis set at the frequency £7 (900 Hz),
`the pulse width pw7is adjustably set at 60-70% of the pulse
`frequency p7 (1/f7), and when frequency is set at
`the
`frequency {8 (1 KHz), the pulse width pw8is adjustably set
`at 70-80% of the pulse frequency pl (1/f8).
`Additionally, when frequency is set at the frequency £9
`(1.5 KHz), the pulse width pw9 is adjustably set at 80-90%
`of the pulse frequency and when frequency is set at
`the
`frequency [10 (2 KHz), the pulse width pw10 is adjustably
`set at 90-100%of the pulse frequency p10 (1/f10).
`FIG. 3(a) shows the pulse frequency pl (1/f1) and the
`pulse width pwl, when the frequency is set at f1 (300 Hz).
`Here, as the pulse frequency pl is large while the pulse
`width pw is small, the driving motor 16 is able to retain
`high torque at low speed. FIG. 3(b) shows the pulse fre-
`quency p4 (1/f4) and the pulse width pw4 when the fre-
`quencyis set at [4 (600 Hz). Here, as the pulse frequency pl
`is medium while the pulse width pwl is also medium, the
`driving motor 16 is medium speed.
`FIG. 3(c) shows the pulse frequency p8 (1/f8 and the
`pulse width pw8, when the frequency is set at [8 (1 KHz).
`Here,
`the driving motor 16 is at high speed and rotates
`efficiently, as the pulse frequency p1 is small while the pulse
`width pw8 is large. FIG. 4 shows a relation of the pulse
`frequency (1-10) based on the data in the Table 1 and
`revolution numberof the driving motor, whichis the throttle
`open degree (rl-r10) of the throttle lever. The pulse fre-
`quency (p1—10) is shown at a vertical axis and the throttle
`open degree (rl-r10)at abscissa.
`
`If the toy car 5 is caused to run in this state, the revolution
`number ofthe driving motor 16 is selected to change the car
`5 speed in the step 3, the selected revolution number being
`instructed from the transmitter 20 to the speed controller 15.
`In step 4, the pulse frequency is set in response to the input
`revolution number, based on the data in the Table 1 pre-input
`in the speed controller 15.
`in response to the
`In step 5,
`the pulse width is set
`revolution number.In step 6, the set pulse frequency andthe
`pulse signal set at the pulse width is output from the speed
`controller 15 to the driving motor 16 whichis in turn driven
`in step 7, to run the toy car 3 at a given car speed.
`For example, where the revolution number ofthe driving
`motor is at rl, the pulse frequency is at pl as shown in the
`Table 1, and the pulse width pw1is set at a low speed run
`of 0-10% of the pulse frequency. Thus, as the pulse fre-
`quency of the pulse signal
`is settable at
`large value, the
`torque TI of the driving motorat the low speed (revolution
`number rl) is settable as shown by the solid line g3 in the
`FIG. 5. Where the revolution number of the driving motor is
`
`As shownin FIG. 4, as the throttle open degree becomes
`small from rl0-r1, the pulse frequency becomeslarge from
`pl to p10, the torque TL becomes higher than conventional
`torque, when the throttle open degreeis, for example, small,
`for example at rl.
`Onthe other hand, when the throttle open degree becomes
`large from rl to rl0, the pulse frequency becomes small
`from p10 to pl. When the throttle open degree is large, for
`example at rl0, the torque 10 becomes lower than the
`conventional torque, but
`is smoothly rotates the driving
`motor 16, to raise its revolution efficiency of the driving
`motor.
`
`Then inputting the data in the Table 1 into the speed
`controller 15 by the driving circuit 14, to run the toy car 5
`based on the data, the flow chart on FIG. 6 is explained.
`In the step 1, we judge whether the data in the Table 1 is
`input or not into the speed controller 15. When the data in
`the Table 1 is input, an old data of the speed controller is
`rewritten to the data in the Table 1 (Step 2). On the other
`hand, when the data in the Table 1 is not input, the old data
`remaining in the speed controller 15. In this explanation, it
`is as if the data is rewritten in the data in the Table L.
`
`15
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`9
`
`

`

`US 6,287,167 B1
`
`5
`sel at r4, the pulse frequencyis at p4, as shown in the Table
`1,
`the pulse width pw4 is set
`alt medium speed run of
`40-50% of the pulse frequency.
`Furthermore, where the revolution number is at r10, the
`pulse frequency is set at p10, as shownin the Table 1, and
`the pulse width pw10 is set at a high speed run of 90-100%
`of the pulse frequency.
`Thus, as the pulse frequency is settable low, the driving
`motor 16 is smoothly rotated at
`the high speed run
`(revolution number r10), as shown by the solid line g3 in
`FIG. 5, to raise the revolution efficiency.
`In the embodiment aforementioned, although the data in
`the Table 1 (whenthe throttle open degree become small, the
`pulse frequency becomeslarge, while when the throttle open
`degree become large, the pulse frequency becomes small), is
`input into the speed controller 15, it is possible to input the
`data reverse to the relation of the throttle open degree and
`the pulse frequency. In the case where the data in the Table
`1
`is pre-input into the speed controller 15, new data is
`inputtable from a keyboard, during the running ofthe toy car
`5:
`
`As above, the invention provides a speed controller by
`which the pulse frequency and the pulse width of the pulse
`signal are changeable, so that the pulse frequency is change-
`able during the car running. Therefore, the torque of the
`driving motor is adjustable in response to the revolution
`number of the driving motor, while the driving motor is
`smoothly rotatable in response to the revolution number of
`the driving motor. Thus, the car runs in response to the states
`of the course.
`What is claimed is:
`1. Adriving circuit ofthe toy car to run with a control of
`a revolution number of a D.C. driving motor mountedon the
`toy car main body wherein said driving circuit has a speed
`controller being able to change a pulse frequency and a pulse
`width of the pulse signal controlling the driving motor.
`2. Adriving circuit of the toy car according to claim 1,
`wherein said speed controller is designed so that its pulse
`frequency is enlarged when the pulse width is decreased and
`the pulse frequency is decreased when the pulse width is
`enlarged.
`3. A driving circuit according to claim 2, wherein said
`speed controller
`is designed such that at a
`low speed
`revolution of the driving motor, the pulse frequency of the
`pulse signal is enlarged, and
`the pulse frequency of the pulse signal is lowered when
`the driving motor rotates at a high speed.
`4. A driving circuit according to claim 3, wherein the toy
`car comprises a main body having front wheels and rear
`wheels, control means for driving the rear wheels of the
`main body, and
`a separate transmitter arranged to transmit a running
`signal to the control means and comprising a control
`lever for adjusting throttle open degree at the transmilt-
`ler.
`
`5. A driving circuit according to claim 4, wherein said
`control means comprise a receiver to receive the signal from
`the transmitter, a driving circuit arranged to feed a speed
`control signal based upon the signal received from the
`receiver,
`the driving motor arrangedto be driven by the pulse signal
`(speed control signal) from the driving circuit, and
`a gear memberarranged to transmit revolutionary force
`from the driving motor to the rear wheels.
`6. A driving circuit according to claim 3, wherein said
`speed controller comprises a receiver to receive a running
`
`15
`
`30
`
`35
`
`40
`
`45
`
`50
`
`55
`
`60
`
`65
`
`6
`signal from a transmitter, a driving circuit arranged to feed
`a speed control signal based upon the signal received from
`the receiver,
`the driving motor arranged to be driven by the pulse signal
`(speed control signal) from the driving circuit, and
`a gear member arrangedto transmit revolutionary force
`from the driving motor to rear wheels.
`7. A driving circuit according to claim 2, wherein said
`speed controller comprises a receiver lo receive a running
`signal from a transmitter, a driving circuit arranged to feed
`a speed control signal based upon the signal received from
`the receiver,
`the driving motorarrangedto be driven by the pulse signal
`(speed control signal) from the driving circuit, and
`a gear member arranged to transmit revolutionary force
`from the driving motor to rear wheels.
`8. A driving circuit according to claim 1, wherein said
`speed controller comprises a receiver to receive a running
`signal from a transmitter, a driving circuit arranged to feed
`a speed control signal based upon the signal received from
`the receiver,
`the driving motor arranged to be driven bythe pulse signal
`(speed control signal) from the driving circuit, and
`a gear memberarranged to transmit revolutionary force
`from the driving motor to rear wheels.
`9. A driving circuit according to claim 8, wherein said
`speed controller comprises pulse width data input therein in
`ten steps of frequency of the pulse signal (speed control
`signal) for controlling the driving motor, with a revolution
`number (throttle open degree) of the driving motor being set
`to match the ten frequency steps.
`10. A driving circuit according to claim 7, wherein said
`speed controller comprises pulse width data input therein in
`ten steps of frequency of the pulse signal (speed control
`signal) for controlling the driving motor, with a revolution
`number (throttle open degree) of the driving motor being set
`to match the ten frequency steps.
`11. A driving circuit according to claim 6, wherein said
`speed controller comprises pulse width data input therein in
`ten steps of frequency of the pulse signal (speed control
`signal) for controlling the driving motor, with a revolution
`number (throttle open degree) of the driving motor being set
`to match the ten frequency steps.
`12. A driving circuit according to claim 5, wherein said
`control means comprise pulse width data input therein in ten
`steps of frequency of the pulse signal (speed control signal)
`for controlling the driving motor, with a revolution number
`(throttle open degree) of the driving motor being set to
`match the ten frequency steps.
`13. Adriving circuit according to claim 12, wherein in the
`ten steps of the pulse width data, a first step is set up to 10%
`of the pulse frequency, a second step from 10—20% of the
`pulse frequency, a third step from 20-30%of the pulse
`frequency, a fourth step from 30-40% of the pulse
`frequency,a fifth step from 40-50% of the pulse frequency,
`a sixth step from 50-60%ofpulse frequency, a seventh step
`from 60-70%of the pulse frequency, an eighth step from
`70-80%of the pulse frequency, a ninth step from 80-90%
`of the pulse frequency and a tenth step from 90-—100%of the
`pulse frequency.
`14. Adriving circuit according to claim 1, wherein in the
`ten steps of the pulse width data, a first step is set up to 10%
`of the pulse frequency, a second step from 10-20% of the
`pulse frequency, a third step from 20-30% ofthe pulse
`frequency, a fourth step from 30-40% of the pulse
`frequency, a fifth step from 40-50% of the pulse frequency,
`
`10
`10
`
`

`

`US 6,287,167 B1
`
`7
`a sixth step from 50-60%ofpulse frequency, a seventh step
`from 60-70% ofthe pulse frequency, an eighth step from
`70-80% of the pulse frequency, a ninth step from 80-90%
`of the pulse frequency anda tenth step from 90—100% of the
`pulse frequency.
`15. Adriving circuit according to claim 11, wherein in the
`ten steps of the pulse width data, a first step is set up to LO%
`of the pulse frequency, a second step from 10-20% of the
`pulse frequency, a third step from 20-30% of the pulse
`frequency, a fourth step from 30-40% of the pulse
`frequency, a fifth step from 40-50% ofthe pulse frequency,
`a sixth step from 50-60% of pulse frequency, a seventh step
`from 60-70% of the pulse frequency, an eighth step from
`70-80% of the pulse frequency, a ninth step from 80-90%
`ofthe pulse frequency and a tenth step from 90-100% ofthe
`pulse frequency.
`16. Adriving circuit according to claim 15, comprising a
`decreasing linear relationship between the pulse frequency
`and the throttle open degree, with the throttle open degree
`becoming smaller when the pulse frequency becomeslarger
`and vice versa.
`17. A driving circuit according to claim 9, comprising a
`decreasing linear relationship between the pulse frequency
`
`8
`and the throttle open degree, with the throttle open degree
`becoming smaller when the pulse frequency becomes larger
`and vice versa.
`18. A driving circuit according to claim 17, wherein the
`torque of the driving motor and revolution number or
`throttle open degree of the driving motor comprising a
`positive curvilinear
`relationship with each other
`that
`increases towardsa limit of torque as the torque and throttle
`open degree both increase.
`19. A driving circuit according to claim 6, wherein the
`torque of the driving motor and revolution number or
`throttle open degree of the driving motor comprising a
`positive curvilinear relationship with one another
`that
`increases towardsa limit of torque as the torque and throttle
`open degree both increase.
`20. A driving circuit according to claim 5, wherein the
`torque of the driving motor and revolution member or
`throttle open degree of the driving motor comprising a
`positive curvilinear relationship that increases towards a
`limit of torque as the torque and throttle open degree both
`increase.
`
`15
`
`11
`11
`
`