CN1049131A

CN1049131A - Digit speed controller for electric vehicle

Info

Publication number: CN1049131A
Application number: CN 89102433
Authority: CN
Inventors: 惠克清
Original assignee: APPLICATION TECHNOLOGY INST WUXI CITY
Current assignee: APPLICATION TECHNOLOGY INST WUXI CITY
Priority date: 1989-07-29
Filing date: 1989-07-29
Publication date: 1991-02-13
Also published as: CN1018169B

Abstract

A kind of digit speed controller for electric vehicle belongs to electrically-actuated throttle device.

Mechanical traction mode, poor reliability, feel discomfort are adopted in the speed governing operation of existing elec. vehicle governor.The present invention adopts the digital voltage speed governing, with forward-backward counter clock signal is counted, and the output digital voltage becomes analog quantity by the digital-to-analogue network, and the analog quantity size is by pressing key control.With this analog quantity modulating pulse width, change the transistor turns time, thereby change the speed of a motor vehicle.This governor is easy to operate, and is safe and reliable, and multiple functions such as battery low-voltage variation, motor overload protection are arranged.This governor is applicable to all kinds elec. vehicle.

Description

Digit speed controller for electric vehicle

Elec. vehicle is to make the energy with storage battery, drives the vehicle of advancing with DC machine.Governor is to be used for elec. vehicle at the device of the adjusting speed of a motor vehicle of advancing.

Existing elec. vehicle governor roughly is divided into three parts:

Function part → control signal processing section → controlled tube portion

Wherein function part all is to adopt brake steel wire to link on the speed-regulating potentiometer (or inducer), changes the resistance of potential device by the steel wire tractive, thereby changes the size of control voltage, and its operation belongs to the mechanical traction mode; Pulsed mode is adopted in the control signal processing section more, produce pulse with a time base circuit, the analog quantity (vdc) of being exported a variation by function part changes pulse width, thereby changes by the ON time of keyholed back plate, change the DC machine driving condition, change the speed of a motor vehicle.

Above-mentioned governor has many weak points, and the one, speed-regulating potentiometer is worked under the situation of tractive being subjected to, and traction steel wire often ruptures or is obstructed, the yielding inefficacy of potential device extension spring, normal bad contact of potential device or damage, the governor functional reliability is poor; The 2nd, operation inconvenience comes the speed governing of tractive brake steel wire by the staff operating handle, and it is uncomfortable that the people feels, and man-machine function is undesirable; The 3rd, braking quality is not good.Brake gear is a kind of pause mechanism, and brake crank one pine is not restarted, and wheel promptly changes, and safety is relatively poor; The 4th, function singleness can not shield to battery low-voltage, motor overload etc.

The object of the present invention is to provide the elec. vehicle governor of another kind of design philosophy.The requirement functional reliability is good, and speed governing is easy to operate, safety and have functions such as storage battery under-voltage protection, motor overload protection.

Technical solution of the present invention is to abandon the power operation mode of speed control, the power operation speed governing is become the digital voltage speed governing of using button operation.Concrete enforcement approach is with clock-signal generator generation clock signal, input forward-backward counter counting, the output digital voltage by the digital-to-analogue network, becomes analog quantity to this digital voltage, the size of analog quantity is controlled arbitrarily by the button on the handle by the rider, analog quantity with this variation removes to modulate a series of impulse singlas, thereby obtains the burst pulse that a string width changes, when F-Zero, this burst pulse disappears, and presses the pushing motor running with a constant DC.Mechanical braking device direct control forward-backward counter resets, and battery low-voltage and motor load protection compare with comparator and nominal value, and comparator output connects the reset terminal of forward-backward counter.

This governor is owing to all change power operation into the electricity operation, and functional reliability is good; Speed governing operation light and flexible, good hand touch have man-machine preferably function; In the time of mechanical brake, motor shuts down, and has improved the safety of operation; Multifunctional circuit is adopted in the control signal processing section, makes this governor have multiple functions such as battery low-voltage protection and motor overload protection.

Fig. 1 is electric line figure of the present invention.

The present invention is further described below in conjunction with Fig. 1.

In speed-regulating manipulation device of the present invention and the control signal processing section, clock voltage signal generation circuit YF1-YF2 is arranged; The clock signal of YF1-YF2 generation is carried out the counting machine Js of reversible counting; The add operation button K1 and the subtraction operation push-button K2 of control Js running state; The gate circuit YF9-YF10 of control counter Js status input signal; The digital voltage of Js output is changed into the digital-to-analogue network of aanalogvoltage; Pulse wave generation circuit A2; Realize the electric signal of A2 output is carried out pulse width modulated modulation circuit A3 with the aanalogvoltage of above-mentioned digital-to-analogue network output.

The clock signal of YF1-YF2 output is second input end of in-gate circuit YF9, YF10 respectively, the mouth of YF9, YF10 respectively with plus coujnt end Cp+ and the subtraction counting end Cp of Js _-Join.

Operation push-button K1, K2 are installed on the vehicle handle, and the Chang Kaiduan point of K1, K2 first input end of AND circuit YF9, YF10 respectively joins the common end grounding of K1, K2.

Be serially connected with respectively between the 3rd input end of mouth Q1-Q4 AND circuit YF9, the YF10 of forward-backward counter Js that addition is completely measured judging circuit and subtraction is completely measured judging circuit;

Above-mentioned all the other relevant circuit connect connection routinely.

Be output as clock signal among the YF1-YF2, carry out state assignment through gate circuit YF9, the Cp+ end of input Js is counted, and the size of count value is controlled by the length that button K1 presses the time, and K1 is turbo.With last inverse process, K2 controls successively decreasing of stepped-up voltage, and K2 is the deceleration button.

The mouth Q1-Q4 of Js connects by the resistance R digital-to-analogue network formed of connection routinely, change the digital voltage signal of Js output into analog voltage signal, output to the in-phase end of A3, in A3, carry out pulse width modulated, A3 exports the pulse that pulse width is variable, promotes transistor BG1-BG2-BG3, changes the length of BG3 pipe ON time, change the operative condition of motor, thereby change the speed of a motor vehicle.

The time that the K1 button is pressed is long more, and the stepped-up voltage accumulated value of Js is big more, and the digital-to-analogue voltage that is input to A3 is high more, and the pulse width of A3 output is wide more, and BG3 pipe ON time is long more, and the speed of a motor vehicle is high more.With last opposite, the time that the K2 button is pressed is long more, and the speed of a motor vehicle is low more.

When the mouth Q1-Q4 of Js is output as addition and completely measures signal " 1111 " state, after four input phase inverter YF8 paraphase, send into YF9, the output of sealing YF9, the Js plus coujnt stops, and elec. vehicle reaches maximum speed; Analogize therewith, the subtraction of Q1-Q4 output is completely measured signal " 0000 " after single input phase inverter YF3-YF6 paraphase, send into four input phase inverter YF7 paraphase after, send into YF10, the output of sealing YF10, Js subtraction counting stops, elec. vehicle reaches dead slow.

For making this governor that more stable mode of operation and more perfect performance be arranged, can also increase some extentions:

Serial connection is prevented twitter circuit YF12-YF13, YF14-YF15 respectively between first input end of operation push-button K1, K2 Chang Kaiduan dotted or gate circuit YF9, YF10;

Two input ends of first input end AND circuit YF11 of gate circuit YF9, YF10 also connect, the reset terminal R of the output termination forward-backward counter Js of YF11, when K1, K2 press simultaneously, YF11 is output as one state, Js resets to " 0000 " state, cut off this moment to the vehicular electric machine power supply, vehicle is in " soft " braking state.

Device relies on brake steel wire to draw the electrical brake K switch 3 of interlock in addition in trailing wheel mechanical brake mechanism, and K3 Chang Kaiduan point meets forward-backward counter reset terminal R, the normally closed end points ground connection of K3.In the time of the mechanical brake mechanical brake, rely on the interlock of mechanical brake steel wire traction, make the K3 closure, Js resets to " 0000 " state, guarantees the safety of braking;

Vehicle battery under-voltage protection comparator A1 is set, and storage battery output voltage E and nominal voltage E1 connect A1 two input ends respectively, and the A1 mouth meets the reset terminal R of Js by diode D1, and when E is lower than E1, Js resets to " 0000 " state;

Elec. vehicle motor overload protection comparator A4 is set, load voltage E _R0Connect A4 two input ends respectively with nominal voltage E1, the A4 mouth is worked as E by the reset terminal R that diode D3 meets Js _R0Be higher than E1, Js resets to " 0000 " state;

This governor each several part functional circuit can be chosen the integrated circuit with corresponding function, for example:

Circuit YF1-YF2 and YF3-AYF6 are with same integrated circuit CD4069; Forward-backward counter Js integrated circuit CD40193; Gate circuit YF9-YF11 is with same integrated circuit CD4023; Four input phase inverters are with same integrated circuit CD4012; YF12-YF15 is with same integrated circuit CD4011; About the conventional connection that function is used, relevant elements is used value to A1-A4 routinely by it with same integrated circuit LM339, the connection of above-mentioned each circuit.

Claims

1, a kind of digit speed controller for electric vehicle comprises speed-regulating manipulation device, control signal processing section, controlled tube portion, it is characterized in that in speed-regulating manipulation device and control signal processing section:

Clock generating circuit YF is arranged ₁-YF ₂To YF ₁-YF ₂The clock signal that produces is carried out the counting machine J of reversible counting _sControl J _sThe add operation button K of running state ₁And subtraction operation push-button K ₂Control counter J ₃The gate circuit YF of status input signal ₉-YF ₁₀With J _sThe digital voltage of output changes the digital-to-analogue network of aanalogvoltage into; Pulse wave generation circuit A ₂, realize A with the aanalogvoltage of above-mentioned digital-to-analogue network output ₂The electric signal of output carries out pulse width modulated modulation circuit A ₃

YF ₁-YF ₂The clock voltage signal of output is in-gate circuit YF respectively ₉, YF ₁₀Second input end, YF ₉, YF ₁₀Mouth respectively with J _sPlus coujnt end C _P+And subtraction counting end C _P-Join;

Operation push-button K ₁, K ₂Chang Kaiduan point AND circuit YF respectively ₉, YF ₁₀First input end joins, K ₁, K ₂Common end grounding;

Forward-backward counter J _sMouth Q ₁-Q ₄AND circuit YF ₉, YF ₁₀The 3rd input end between be serially connected with respectively that addition is completely measured judging circuit and subtraction is completely measured judging circuit;

Above-mentioned all the other relevant circuit connect connection routinely.

2, according to the described digit speed controller for electric vehicle of claim 1, it is characterized in that:

Be connected in series anti-twitter circuit YF12-YF13, YF14-YF15 between first input end of Chang Kaiduan dotted or gate circuit YF9, the YF10 of operation push-button K1, K2 respectively;

Two input ends of first input end AND circuit YF11 of gate circuit YF9, YF10 also connect, the reset terminal R of the output termination forward-backward counter Js of YF11.

Kill the electrical brake K switch 3 of installing dependence brake steel wire traction interlock on the mechanism of car in addition at trailing wheel machinery, K3 Chang Kaiduan point meets forward-backward counter reset terminal R, the normally closed end points ground connection of K;

Four input phase inverter YF8 are that addition is completely measured circuit; Four input ends of four input phase inverter YF7 are connected in series single input phase inverter YF3-YF6 respectively and completely measure circuit as subtraction.

3, according to the described digit speed controller for electric vehicle of claim 1, it is characterized in that:

Vehicle battery under-voltage protection comparator A1 is set, and storage battery output voltage E and nominal voltage E1 connect A1 two input ends respectively, and the A1 mouth meets the reset terminal R of reversible gauge Js by diode D;

Elec. vehicle motor overload protection comparator A4 is set, and load voltage E and nominal voltage E1 connect A4 two input ends respectively, and the A4 mouth meets the reset terminal R of forward-backward counter Js by diode D3.

4, according to claim 1,2 described elec. vehicle governors, it is characterized in that:

Circuit YF1-YF2 and YF3-YF6 are with same integrated circuit CD4069; Forward-backward counter Js integrated circuit CD40193; Gate circuit YF9-YF11 is with same integrated circuit CD4023; Four input phase inverters are with same integrated circuit CD4012; Anti-twitter circuit YF12-YF15 has same integrated circuit CD4011; A1-A4 is with same integrated circuit LM339; The conventional connection that the connection of above-mentioned each circuit is used by its relevant function, relevant elements is used value routinely.

5, according to the described elec. vehicle governor of claim 3, it is characterized in that:

Circuit YF1-YF2 and YF3-YF6 are with same integrated circuit CD4069; Forward-backward counter Js integrated circuit CD40193; Gate circuit YF9-YF11 is with same integrated circuit CD4023; Four input phase inverters are with same integrated circuit CD4012; Anti-twitter circuit YF12-YF15 is with same integrated circuit CD4011; A1-A4 is with same integrated circuit LM339; The conventional connection that the connection of above-mentioned each circuit is used by its relevant function, relevant elements is used value routinely.