CN2705338Y

CN2705338Y - Electric bicycle controller

Info

Publication number: CN2705338Y
Application number: CN 200420028296
Authority: CN
Inventors: 宋培芝
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-01-19
Filing date: 2004-01-19
Publication date: 2005-06-22
Anticipated expiration: 2014-01-19

Abstract

A kind of Electric Bicycle Driver, comprise shell and dress within it by power supply connecting bridge, line under-voltage signal section, brake signal part, drive the circuit that prime, impulse modulation part, current limliting signal section, driver stage, motor connecting bridge and driver stage switch and circuit signal are partly formed, it is characterized in that, in circuit, also include anti-frightened car protective circuit, short-circuit protection and current limliting signal section; Anti-frightened car protective circuit, its input are connected with power supply connecting bridge, brake signal part, driver stage switch and current signal part, driver stage respectively, and its output partly is connected with driver stage switch and current signal; Short-circuit protection and current limliting signal section, its input partly is connected with power supply connecting bridge, driver stage switch and current signal respectively, and its output partly is connected with driver stage switch and current signal.The utility model can be stopped frightened car, prolongs the service life of controller, and increases mileages of continuation.

Description

Electric Bicycle Driver

Technical field

The utility model relates to controller, relates in particular to Electric Bicycle Driver.

Background technology

Along with the generally raising of people's lives, Electrical Bicycle generally uses in the city, and more extensive universal trend is arranged.Present Electric Bicycle Driver, its outward appearance as shown in Figure 1, its circuit block diagram as shown in Figure 2, it includes power supply connecting bridge, the under-voltage signal section of power line voltage, brake signal part, speed-regulating signal part, drives prime, pulse duration modulation part, current limliting signal section, driver stage, motor connecting bridge.The major defect of sort controller has: 1, not anti-frightened car protective circuit, in case power tube, driving circuit, quantizer burns or component breakdown, just might cause shying car (out of control), its consequence is gently then injured, weigh then car crash; What 2, the current limliting signal of controller adopted is current average, because the real current value is big more a lot of than aviation value sometimes, diminishes the service life of controller, or causes power tube etc. to burn, puncture thus and cause frightened car; Therefore what 3, adopt in the under-voltage protection is the method for comparison, causes vibration easily and can not make full use of the energy content of battery, so travelled distance is lacked.

The utility model content

In order to overcome the above-mentioned shortcoming that existing Electric Bicycle Driver exists, the utility model provides a kind of Electric Bicycle Driver, and it stops to prolong the service life of controller because of shying the fatal accident that car causes, and increases the mileages of continuation of Electrical Bicycle.

The technical scheme that its technical matters that solves the utility model adopts is:

A kind of Electric Bicycle Driver, comprise shell and dress within it by power supply connecting bridge, line under-voltage signal section, brake signal part, drive the circuit that prime, impulse modulation part, current limliting signal section, driver stage, motor connecting bridge and driver stage switch and circuit signal are partly formed, it is characterized in that, in described circuit, also comprise anti-frightened car protective circuit, short-circuit protection and current limliting signal section;

Described Electric Bicycle Driver, wherein anti-frightened car protective circuit, its input is connected with power supply connecting bridge, brake signal part, driver stage switch and current signal part, driver stage respectively, and its output partly is connected with driver stage switch and current signal;

Described Electric Bicycle Driver, wherein short-circuit protection and current limliting signal section, its input partly is connected with power supply connecting bridge, driver stage switch and current signal respectively, and its output partly is connected with driver stage switch and current signal.

The beneficial effects of the utility model are that this Electric Bicycle Driver can be stopped effectively because of shying the personal injury that car causes; Can prevent that the power tube and other element that cause because of overcurrent from burning, and prolonged the controller life-span; And can make full use of battery power, improve the ability that continues of car.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the stereoscopic figure of Electric Bicycle Driver

Fig. 2 is the circuit block diagram of existing Electric Bicycle Driver

Fig. 3 is the circuit block diagram of Electric Bicycle Driver of the present utility model

Fig. 4 is that the circuit of the specific embodiment of Fig. 3 is always schemed.

Fig. 5 A is the circuit block diagram of anti-frightened car protective circuit among Fig. 3

Fig. 5 B is the concrete enforcement circuit diagram of Fig. 5 A

Fig. 5 C is the frightened car protective circuit block diagram that the G electrode potential of 1T1 raises when preventing

Fig. 5 D is the specific embodiment circuit diagram of Fig. 5 C

Fig. 6 A is the circuit block diagram of the short-circuit protection among Fig. 3

Fig. 6 B is the specific embodiment circuit diagram of short-circuit protection

Fig. 6 C is the circuit diagram of restricted portion

Fig. 7 A is the circuit block diagram of the under-voltage signal of power line voltage among Fig. 3

Fig. 7 B is the specific embodiment circuit diagram of Fig. 7 A

The number in the figure explanation:

1 controller housing, 2 shell interior circuit boards draw lead

The specific embodiment

Our company is according to target design of the present utility model and drawn the circuit block diagram of Electric Bicycle Driver as shown in Figure 3, then again on the basis of Fig. 3 specific design as shown in Figure 4 the Electric Bicycle Driver circuit diagram and made model machine and measured and revise, the Electric Bicycle Driver of face shaping shown in figure I made in then final typing.For advantage of the present utility model is described, in conjunction with Fig. 4 respectively to 1, anti-frightened car protective circuit; 2, current limliting and short-circuit protection circuit; 3, the principle of work of under-voltage protecting circuit is described as follows:

1, anti-frightened car protective circuit part: (referring to Fig. 4, Fig. 5 A, Fig. 5 B, Fig. 5 C)

Frightened car definition, returning the brake rear motor when handle can not stop operating, and is considered as frightened car.

The drain electrode of motor negative terminal field effect transistor 1T1 shows as low level when shying car, this low level ends 2Q3 by 2R1, the SB end that brakes this moment becomes low level by high level, this low level by 2R10 and 2C2 integration after, make the negative input end of 1C2 amplifier be lower than positive input terminal (negative terminal is higher than anode when not braking), its mouth output high level also passes through resistance 2R8 diode 2D, make the 2Q2 conducting, with the grid of the 2T1 of 1T1 polyphone by high horizontal drawing to low level, 2T1 ends, the drain electrode of 2T1 and the source electrode of 1T1 (owing to ending of 2T1) are high level by the low level degree, cut off electric motor loop, and motor stops operating; The high level of 2T1 drain electrode, by 2R4,2R6 dividing potential drop and and the 2C1 integration be added on the base stage of 2Q2, make the 2Q2 conducting, 2T1 by being maintained.

When the drain electrode of 1T1 rises to high level, for raising, the gate-source voltage difference that prevents 1T1 damages 1T1, the resistance 1R3 of 1T1 is connected with source electrode.

The 12V current supply circuit of 1Q1 and 1R2 has increased 1D3;

For the source voltage rising back pulse width modulator PWM that prevents 1T1 has high potential to be added to driving stage, set up the base stage that the high level of 1T1 source electrode rising is added to 2Q1 by 2R2, make the 2Q1 conducting, the level that has limited former utmost point rising enters driving stage, thereby the more effective driving stage that prevents burns.

2, current limliting and short-circuit protection circuit part (referring to Fig. 4, Fig. 6 A, Fig. 6)

1T1 and 2T1 are series circuit 2T1 work conducting state, its conducting resistance is a fixed value, loss in voltage when leading to 2T1, motor working current is just arranged, this voltage is directly proportional with motor working current, get this voltage, be added to (amplifier) negative input end and the 3R2 of 1C1 by 3R1 for the current limliting signal, 3R3, being added to amplifier positive input terminal (this voltage is corresponding with cut-off current) after the 5V dividing potential drop compares, the pressure drop that is produced in the 2T1 drain electrode when motor power transfinites the stream electric current just surpasses the voltage of IC1 normal phase input end, mouth output low flat by diode 3D1 handle DS signal through 6R3,6C1 amplifier IC6, signal after the 6R2 conversion drags down, its B point output decline (dutycycle decline) driving stage 1Q2 behind the PWMA point signal step-down, also the descend dutycycle of 1T1 of the dutycycle of 1Q1 also descends, and current of electric is restricted.Because the signal of this process is a peak signal, so the power supply that is limited is a real current.

Short-circuit protection:

When the motor short circuit with when having excessive current to occur, negative input end and the 3R5 that a short circuit current corresponding with it and high current signal are added to comparator IC3 just exported in 2T1 drain electrode, 3R4 compares the dividing potential drop of 5V and the positive input (the pairing current value of this voltage is greater than the cut-off current value) that is added to comparator IC3, the mouth of IC3 is moved the grid potential of 2T1 to low level when the motor short circuit overcurrent, 2T1 is ended, the drain electrode that the cut-out motor returns its 2T1 when 2T1 ends is a high level by the low level degree, this level passes through 2R4, be added on the base stage of 2Q2 behind 2R6 and the 2C1 dividing potential drop integration, the 2Q2 conducting is moved the grid potential of 2T1 to low level, and ending of 2T1 is maintained.

3, the under-voltage signal section of prior art is changed into circuit shown in Fig. 7 A, Fig. 7 B:

The magnitude of voltage of the negative input end of amplifier IC5 is 4R3 and the 5R3 voltage to the dividing potential drop of 5V, the magnitude of voltage of the positive input terminal of IC5 be 5R1,5W1,5R4 when battery terminal voltage is equaled 31.5V (or 21V) partial pressure value and and the negative terminal input voltage value equate, be connected resistance 5R2 with mouth at the negative-phase input of 1C5.

The positive input terminal of IC5 just is lower than the negative input end (discharge of battery when power line voltage is lower than 31.5V; big its pressure drop of electric current is also big; change low discharging current if when heavy-current discharge, drop to 31.5V; just going back up to more than the 31.5V) its mouth just has a signal by 5R2 and the ratio of 5R3 to transfer pulsewidth the input A end signal of device PWM to pull down; the output signal dutyfactor value decline of PWM also descends by the ratio that driving stage is added to the duty cycle signals of 1T1 grid; thereby the working current of motor is descended; the discharge current of battery reduces and the voltage rising; can also ride when less revolution (low speed driving) output signal of a segment distance (being approximately 5 kilometers) IC5 when reducing the speed cell pressure and can not go back up to 31.5V of motor is turn-offed the signal of the input end A of pulse width modulator PWM; the B point does not have signal output driver stage 1T1 to quit work; the motor dead electricity stops operating, and has so not only improved the mileage of riding and also can well protect battery.

Claims

1, a kind of Electric Bicycle Driver, comprise shell and dress within it by power supply connecting bridge, line under-voltage signal section, brake signal part, drive the circuit that prime, impulse modulation part, current limliting signal section, driver stage, motor connecting bridge and driver stage switch and circuit signal are partly formed, it is characterized in that, in described circuit, also comprise anti-frightened car protective circuit, short-circuit protection and current limliting signal section;

Described anti-frightened car protective circuit, its input is connected with power supply connecting bridge, brake signal part, driver stage switch and current signal part, driver stage respectively, and its output partly is connected with driver stage switch and current signal;

Described short-circuit protection and current limliting signal section, its input partly is connected with power supply connecting bridge, driver stage switch and current signal respectively, and its output partly is connected with driver stage switch and current signal.