CN2870299Y

CN2870299Y - DC. brush-less motor system

Info

Publication number: CN2870299Y
Application number: CNU200520094753XU
Authority: CN
Inventors: 曹学峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-15
Filing date: 2005-12-15
Publication date: 2007-02-14
Anticipated expiration: 2015-12-15

Abstract

The utility model relates to a brushless DC motor system, pertaining to electromechanical product manufacturing industry. The new-type brush DC motor system can overcome the defects of traditional brush DC motor, such as high accident rate, high frequency of maintenance and repair and short service life. The motor system comprises components and circuits such as speed-regulating handle, signal modulating circuit, clock/PWM circuit, decoder two-phase PWM circuit. An electronic switch composed of a triode and a resistance is provided on the speed-regulating handle, and inching switch is also provided; magnetic steel is provided with a clad which conducts electricity and magnetism; triode is arranged on the current detecting circuit, programming GAL16V8 block is provided on the phase-sequence decoder, receiving single-phase PWM signals and exporting two-phase PWM signals. The motor system features lower frequency of maintenance and repair (almost maintenance free).

Description

A kind of DC brushless motor system

Technical field

A kind of DC brushless motor system of the utility model belongs to electromechanical industries, is the dynamical system of using in electric motor car specifically.

Background technology

Many shortcomings such as at present, it is brush direct current motor that electric bicycle, battery-operated motor cycle, three, the four-wheel electric motor car of market operation extensively adopt power driven system, and that ubiquity is fragile, rate of failure is high, maintenance is frequent, useful life is short.

The utility model content

The purpose of this utility model is the defective that exists at traditional like product, designed a kind of governing system of new structure, adopt brushless electric machine, increase the various measures of rotor magnetic steel surface coating layer, make the electric motor car governing system reach the effect of long service life, low, the few maintenance of failure rate or freedom from repairs.

A kind of DC brushless motor system is to be made of electromechanical component and control circuit two parts, the stator of motor, rotor, position transducer is formed dynamo-electric part, speed-regulating handle bar, signal conditioning circuit, clock/pwm circuit, decoder two-phase pwm circuit, the power component drive circuit, current converter and current detection circuit are formed the control circuit part, it is characterized in that the speed-regulating handle bar signal is input to signal conditioning circuit, signal after the arrangement is sent into clock/pwm circuit, single pwm signal by clock/pwm circuit output is delivered to decoder two-phase pwm circuit, decoder two-phase pwm circuit also links to each other with brushless electric machine, accept the signal of motor/position transducer, decoder two-phase pwm circuit output signal is to the power component drive circuit, power component drive circuit output signal is to current converter, current converter is communicated with motor, the signal of current converter is input in the power component drive circuit, the power component drive circuit is provided with current detection circuit, and the current signal after current detection circuit detects is input to decoder two-phase PMW circuit through the current protection temperature protection circuit; Decoder two-phase pwm circuit also receives the signal of speed-regulating handle bar fine motion protection switch K1, also is provided with shift K switch 2 in the motor;

The magnet steel surface that the rotor of brushless electric machine is pasted is provided with the coating layer of magnetic conduction conduction; Current detection circuit is provided with triode BG1; Decoder two-phase pwm circuit adopts programmable module GAL16V8 device, accepts the single-phase PWM signal of clock/pwm circuit output, output two-phase pwm signal, driving power element BG4 and BG5 respectively; Speed-regulating handle bar is provided with the electronic switch and the sensitive switch K1 of triode BG9 and resistance R 5 each components and parts composition; Be provided with three shift K switch 2 in the brushless electric machine, shift K switch 2 moves to upper contact, forms the star winding that is made of three single group coils, and shift K switch 2 moves to the next contact, forms the star winding that is made of three two group series coils.

Good effect of the present utility model is that rate of failure is low, and motor adopts brushless electric machine, has eliminated brush loss, electronic switch and sensitive switch that speed-regulating handle bar is provided with, and " hair car " accident that the negative pole broken string is easily produced is no longer recurred; Traditional governing system rate of failure height, maintenance is frequent, the durability extreme difference, general useful life is about 1 year, and this long product lifecycle almost can reach freedom from repairs.

Description of drawings

Fig. 1, the utility model overall structure block diagram, wherein: K1 is a sensitive switch, K2 is the shift switch;

Fig. 2, current detection circuit figure among the utility model Fig. 1, wherein: BG1, BG2 are triode, and D1 is a diode, and C1, C2, C3 are respectively electric capacity, and R1-R4 represents resistance respectively, RL1 is load;

Fig. 3, the utility model decoder two-phase pwm circuit figure, wherein: PWM1, PWM2 represent drive signal respectively, and BG3-BG8 represents triode respectively, and LR2-LR4 represents load respectively;

Fig. 4, the schematic diagram of the GAL16V8 functional module that adopts in the decoder two-phase pwm circuit among the utility model Fig. 1, wherein: D2, D4 are inverter, and D3 is a trigger, and U1, U2 represent respectively or door, 1,2,3......8 represents the pin item respectively;

Fig. 5, shift construction of switch schematic diagram in the motor among the utility model Fig. 1;

Fig. 6, the speed-regulating handle bar modular construction schematic diagram among the utility model Fig. 1, wherein: BG9 is a triode, and R5 is a resistance, and 9,10,11 is the pin item.

Embodiment

To structure of the present utility model and operation mechanism, further specify as follows in conjunction with the accompanying drawings:

The utility model is made of electromechanical component and control circuit two large divisions; the stator of motor; rotor; each parts of position transducer are formed dynamo-electric part; speed-regulating handle bar; the whole circuit that buries of signal; clock/pwm circuit; decoder two-phase pwm circuit; the power component drive circuit; each circuit of current converter and current detection circuit is formed circuit control system; its annexation sees also Fig. 1; current converter is by storage battery power supply; controlled by the power component drive circuit; motor adopts dc brushless motor; it is the two-phase pwm signal that phase sequence decoder two-phase pwm circuit is accepted clock/PWM single-phase PWM conversion of signals; and and position sensor signal; filter guard signal; steering controling signal is integrated; deliver to the continuous power component drive circuit in position again and amplify, drive whole system work.The operating current of system is by the output of the current detection circuit that links to each other with the power component drive circuit, delivers to continuous electric current again, temperature protection circuit compares, and delivers to phase sequence decoder two-phase PWM at last.Whole system controller and motor are structure as a whole, and unfailing performance is splendid, can reach to avoid the degree of keeping in repair basically.

Rotor circular arc magnet steel surface is provided with the coating layer of magnetic conduction conduction, and its effect is that the field fluctuation between stator and rotor is reduced, and improves the motor maximum moment, reduces the motor magnetic loss, can also reduce whirling vibration simultaneously.Current detection circuit is provided with triode BG1 2N5551 as electronic switch, and the voltage drop during the detection power element conductive can be satisfied the specification requirement of system fully, has simplified current detector spare, has reduced system cost.Decoder two-phase pwm circuit adopts module GAL16A8 programming device, accepts clock/PWM single-phase PWM signal, output two-phase pwm signal, driving power element BG3, BG5, BG7 and BG4, BG6, BG8 (seeing Fig. 3,4 for details) respectively; The rotating lock function that decoder is provided with, only when system start-up, come into force, during the reverse afterflow of the power component of decoder in current converter, start synchronous rectification, power component starts synchronous rectification when afterflow, the maximum power loss of power component can reduce by 50%; As seen from Figure 4, after pin 1 input of output signal by trigger D3 of programming device GAL16V8 with clock/PWM, pin 2 outputs of slave flipflop D3, or door U1 in, single-phase PWM is by pin 4 input, and by pin 3 outputs, or single pwm signal of importing among the U2 of door from pin 7 inputs, by pin 6 outputs.Speed-regulating handle bar is provided with the electronic switch and the sensitive switch K1 of triode BG9 and resistance R 5 compositions, and when its negative pole circuit fractureed, output pin 11 output voltages were zero, and motor is out of service, has avoided " hair car " accident to take place effectively.Three shift K switch 2 are set in the motor, when switch moves to upper contact, form the star winding that constitutes by three 40 circle coils, switch moves to the next contact, the star winding that formation is made of three 104 circle coils changes the motor windings number of turn, has enlarged the rotating speed/moment scope of brushless electric machine.

Claims

1. a DC brushless motor system is to be made of electromechanical component and control circuit two parts, the stator of motor, rotor, position transducer is formed dynamo-electric part, speed-regulating handle bar, signal conditioning circuit, clock/pwm circuit, decoder two-phase pwm circuit, the power component drive circuit, current converter and current detection circuit are formed the control circuit part, it is characterized in that the speed-regulating handle bar signal is input to signal conditioning circuit, signal after the arrangement is sent into clock/pwm circuit, single pwm signal by clock/pwm circuit output is delivered to decoder two-phase pwm circuit, decoder two-phase pwm circuit links to each other with brushless electric machine, accept the signal of motor/position transducer, decoder two-phase pwm circuit output signal is to the power component drive circuit, power component drive circuit output signal is to current converter, current converter is communicated with battery feed and motor, the current signal of current converter is input in the power component drive circuit, the power component drive circuit is provided with current detection circuit, and the signal after current detection circuit detects is input to decoder two-phase PMW circuit through the current protection temperature protection circuit; Decoder two-phase pwm circuit also receives the signal of speed-regulating handle bar fine motion protection switch K1, also is provided with shift K switch 2 in the motor.

2. DC brushless motor system according to claim 1 is characterized in that the magnet steel surface of the rotor stickup of dc brushless motor is provided with the coating layer of magnetic conduction conduction.

3. DC brushless motor system according to claim 1 is characterized in that current detection circuit is provided with triode BG1.

4. DC brushless motor system according to claim 1, it is characterized in that decoder two-phase pwm circuit adopts programmable module GAL16V8 device, accept the single-phase PWM signal of clock/pwm circuit output, output two-phase pwm signal, driving power element BG3, BG5, BG7 and BG4, BG6, BG8 respectively.

5. DC brushless motor system according to claim 1 is characterized in that speed-regulating handle bar is provided with the electronic switch and the sensitive switch K1 of triode BG9 and resistance R 5 each components and parts composition.

6. DC brushless motor system according to claim 1, it is characterized in that being provided with in the brushless electric machine three shift K switch 2, shift K switch 2 moves to upper contact, the star winding that formation is made of three single group coils, shift K switch 2 moves to the next contact, forms the star winding that is made of three two group series coils.