CN2544463Y

CN2544463Y - Quick braking dc motor and electric driven vehicle brake system thereof

Info

Publication number: CN2544463Y
Application number: CN 02230836
Authority: CN
Inventors: 姚湘江
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-08
Filing date: 2002-04-08
Publication date: 2003-04-09
Anticipated expiration: 2012-04-08

Abstract

The utility model relates to a quick braking DC motor and an electric driven vehicle brake system thereof. The main points are as follows: the DC motor is equipped with a switch or a switch circuit which can cause the motor to be short-circuited when the power supply is cut off; the circuit of the brake system is equipped with a switch or a switch circuit which can cause the DC motor to be short-circuited when the power supply of the DC motor is cut off. When the power supply is cut off, the DC motor is short-circuited, so that the current caused by the inertia of the DC motor can produce a rotating magnetic field opposite to the rotating direction of the inertia in the motor and a strong magnetic damping is produced in the motor, consequently, the DC motor is braked quickly. The utility model has the advantages of simple structure, good braking effect, non-easy sliding and malfunction. In particular, when used in the electric vehicles, electric motorcycles, electric bicycles and other electric vehicles, the utility model can also greatly reduce the wear of mechanical brake parts and prolong the service life of the parts, fully ensure the braking effect. Moreover, even in adverse weather conditions, the utility model can also be rapidly, gradually and smoothly braked, thereby greatly improving safety performance and ensuring safety.

Description

Fast braking direct current machine and electrical vehicle braking system thereof

Technical field

The utility model relates to a kind of fast braking direct current machine and electrical vehicle braking system thereof.

Background technology

Existing direct current machine all can not fast braking, and after cutting off the electricity supply, direct current machine also can rotate under action of inertia.At present, generally adopt the mechanical device braking method to make the direct current machine fast braking, promptly use mechanical device locking rotating shaft or slave unit, complex structure, braking effect is poor, and mechanical device is easy to wear to be skidded, damages malfunctioning, very easily causes inconvenience even danger and disaster.

The utility model content

At above problem, the purpose of this utility model provides the fast braking direct current machine and the electrical vehicle braking system thereof that after a kind of the cutting off the electricity supply direct current machine is stopped operating rapidly.

A kind of direct current machine of fast braking comprises direct current machine, it is characterized in that: be provided with the switch or the switching circuit that can make its short circuit when cutting off the electricity supply on direct current machine.

A kind of electrical vehicle braking system comprises brake system, it is characterized in that: be provided with the switch or the switching circuit that can make the direct current machine short circuit when cutting off dc motor power in the circuit of brake system.

Above-mentioned switch can be a relay, and controllable silicon, bipolar transistor or field effect transistor etc. also can be switching circuits.

The purpose of this utility model realizes by short circuit direct current machine when cutting off the electricity supply.When cutting off the electricity supply, direct current machine also can rotate and produce electric current under action of inertia, since short circuit the output line of direct current machine, the electric current that inertia produced can produce a rotating magnetic field opposite with the inertia direction of rotation in motor, make motor internal produce very strong magnetic damping, thereby make the direct current machine fast braking.Have simple in structurely, good braking effect is difficult for skidding, malfunctioning; Particularly be used in the wearing and tearing that can also reduce the mechanical brake parts on the motor vehicles such as electric automobile, battery-operated motor cycle, electric bicycle greatly, prolong its useful life, fully guarantee braking effect, even under disadvantageous weather conditions, also can be fast, gradually, braking reposefully, improve security performance greatly, guaranteed safety.

Description of drawings

Fig. 1 is the circuit block diagram of a kind of electrical vehicle braking system of the present utility model,

Fig. 2 is a kind of circuit diagram of Fig. 1;

Fig. 3 is the circuit block diagram of another kind of electrical vehicle braking system of the present utility model,

Fig. 4 is a kind of circuit diagram of Fig. 3.

Embodiment

Describe in detail below in conjunction with embodiment and accompanying drawing thereof:

Fig. 1 is a kind of electronic electromagnetic brake circuit theory diagram that is used for the single-phase output DC machine on the electrical vehicle braking system that utilizes the design of the utility model method.When needing brake, press brake switch K, the pre-braking of brake circuit sends brake signal, K switch 1 drive circuit works, and K1 is opened, and makes the direct current machine outage, and K switch 2 drive circuit works and then make the K2 closure, and the direct current machine short circuit reaches the braking purpose.

Fig. 2 is a kind of circuit diagram of Fig. 1.The K switch 2 among the suitable Fig. 1 of Q1 should be managed in field wherein, and Q1 can make continued flow tube and use when turn-offing; Q2 quite and the K switch 1 of Fig. 1, when not braking, Q2 makes the driving power pipe of direct current machine.Here diode D1, D2 makes the braking prewired circuit when brake switch K closure, makes Q2 turn-off by D2 and interlock circuit, the direct current machine outage, the grid of P-channel field-effect transistor (PEFT) pipe Q1 is drawn by diode D1 to put low level, make the Q1 conducting, the direct current machine output line is by short circuit, and motor is braked.Open brake switch K, circuit returns back to normal operating conditions.

Fig. 3 is a kind of electronic electromagnetic brake circuit theory diagram that is used for the three-phase DC motor on the electrical vehicle braking system that utilizes the design of the utility model method.When pressing brake switch K, the pre-braking of brake circuit sends brake signal, ABC three-phase drive circuit becomes low level to the grid G of field effect transistor Q1, Q2, Q3 automatically, Q1, Q2, Q3 are turn-offed, the three-phase DC motor outage, meanwhile, field effect transistor Q4, Q5, Q6 grid are high level entirely, Q4, Q5, Q6 conducting, the three-phase of three-phase DC motor is failed the mutual short circuit of line, reaches the purpose of braking.

Fig. 4 is a kind of circuit diagram of Fig. 3.Operate as normal can be provided with potentiometer by speed and drive direct current machine, and direct current machine is operated in the rotating speed of requirement.When pressing brake switch K, Q4, Q5 should be managed in the field, Q6 makes Q4, Q5, Q6 turn-off by diode D1 and interlock circuit, the motor outage, and P-channel field-effect transistor (PEFT) pipe Q1, Q2, Q3 pass through diode D2, D3, D4 by open-minded simultaneously, the mutual short circuit of direct current machine three-phase output line, direct current machine is braked.Trip switch K, circuit is back to normal operating conditions.

Claims

1, a kind of direct current machine of fast braking comprises direct current machine, it is characterized in that: be provided with the switch or the switching circuit that can make its short circuit when cutting off the electricity supply on direct current machine.

2, the direct current machine of energy fast braking according to claim 1, it is characterized in that: switch can be a relay, also can be controllable silicon, bipolar transistor or field effect transistor etc.

3, a kind of electrical vehicle braking system comprises brake system, it is characterized in that: be provided with the switch or the switching circuit that can make the direct current machine short circuit when cutting off dc motor power in the circuit of brake system.

4, electrical vehicle braking system according to claim 3 is characterized in that: switch can be a relay, also can be controllable silicon, bipolar transistor or field effect transistor etc.