CN201789463U

CN201789463U - Brushless controller for electric bike

Info

Publication number: CN201789463U
Application number: CN2010202324604U
Authority: CN
Inventors: 戴隆党
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-06-21
Filing date: 2010-06-21
Publication date: 2011-04-06
Anticipated expiration: 2020-06-21

Abstract

A brushless controller for an electric bike belongs to the technical field of electric bike controllers. An output end of a brushless motor controller IC1 is connected with three driving chips IC2, IC3 and IC4, a fourth pin, a fifth pin, a sixth pin and an eighth pin of the brushless motor controller IC1 are connected with a motor Hall sensor, a voltage stabilizing chip IC 5 provides working power VCC for the chips, three bootstrap capacitors are respectively connected between a sixth pin and an eighth pin of the driving chip IC2, between a sixth pin and an eighth pin of the driving chip IC3 and between a sixth pin and an eighth pin of the driving chip IC4, isolating diodes are respectively arranged between the working power VCC and the eighth pins of the driving chip IC2, the driving chip IC3 and the driving chip IC4, and the sixth pins of the driving chip IC2, the driving chip IC 3 and the driving chip IC4 are respectively connected with a phase U, a phase V and a phase W of a motor. The brushless controller adopts the special brushless motor control chip, adopts the internal magnetic sensor (the Hall element) to detect rotation positions of the motor, inputs currents in different directions for electronic commutation, solves the power supply problem of a VDMOS field-effect transistor by externally connecting one isolating diode and one bootstrap capacitor to each driving chip, and increases reliability in use.

Description

The electric bicycle brushless controller

Technical field

The utility model belongs to the technical field of electric bicycle controller, is specifically related to a kind of brushless controller for electric bicycle.

Background technology

Need to control the speed of motor in the electric bicycle by controller, the control brake, the also control that has is reported to the police.What electric bicycle extensively adopted at present is direct current permanent magnet motor, and it is constantly rotated forward, will commutate.Brush motor is to adopt the commutate motor of work of carbon brush and commutator, and brushless electric machine is a kind of special direct current machine, it adopts built-in magnetic sensor (Hall unit) to detect the position that motor turns to, and the electric current of importing different directions again carries out electronic commutation.Between brush motor carbon brush and the commutator friction is arranged, can wear and tear, and not friction between the transducer of brushless electric machine and the magnet can not worn and not torn.Brush motor is to guarantee that by commutator (also being commutator) magnetic field of rotor (rotating part) and standing part keeps continuous attraction or repulsive force towards a direction.These most important parts of cover commutation mechanism are exactly brush, and controller need not change the sense of current, and its controller is the brush controller is arranged.Commutator has the contact, and wearing and tearing are arranged.And brshless DC motor itself does not have commutator, changes motor coil internal current direction by controller, guarantees the magnetic field of rotor and standing part equally, keeps continuous attraction or repulsive force towards a direction.Controller adopts the transistor noncontacting switch, and is never wornout, Here it is brushless controller.Brushless controller is generally determined the position, rotor field by Hall element, changes the sense of current for corresponding coil on appropriate opportunity.

The utility model content

At problems of the prior art, the purpose of this utility model is to provide a kind of technical scheme of brushless controller for electric bicycle, an external isolating diode and a bootstrap capacitor on chip for driving, the power issue of solution VDMOS field effect transistor improves the reliability of using.

Described electric bicycle brushless controller, it is characterized in that comprising brushless electric machine control chip IC1, the output of brushless motor controller IC1 connects 3 tunnel chip for driving IC2, IC3, IC4,4 of brushless electric machine control chip IC1,5,6,8 pin connect the motor Hall element, external power source provides working power VCC for each chip after by voltage stabilizing chip IC 5 lowering and stabilizing blood pressures, chip for driving IC2, IC3,6 of IC4, connect bootstrap capacitor between 8 pin respectively, chip for driving IC2, IC3, be connected isolating diode, chip for driving IC2 between 8 pin of IC4 and the working power VCC, IC3,6 pin of IC4 connect the U of motor respectively, V, the W phase.

Described electric bicycle brushless controller, 2 pin that it is characterized in that described brushless electric machine control chip IC1 are connected with the 2 pin high level inputs of chip for driving IC2,21 pin of brushless electric machine control chip IC1 are connected with the low level input of 3 pin, and inverter all is set between the two-way input circuit.

Described electric bicycle brushless controller, 1 pin that it is characterized in that described brushless electric machine control chip IC1 is connected with the 2 pin high level inputs of chip for driving IC3,20 pin of brushless electric machine control chip IC1 are connected with the low level input of 3 pin, and inverter all is set between the two-way input circuit.

Described electric bicycle brushless controller, 24 pin that it is characterized in that described brushless electric machine control chip IC1 are connected with the 2 pin high level inputs of chip for driving IC4,19 pin of brushless electric machine control chip IC1 are connected with the low level input of 3 pin, and inverter all is set between the two-way input circuit.

The utility model adopts special-purpose brushless electric machine control chip, adopt built-in magnetic sensor (Hall unit) to detect the position that motor turns to, the electric current of importing different directions again carries out electronic commutation, and not friction can not produce wearing and tearing between the transducer of brushless motor controller and the magnet.An external isolating diode and a bootstrap capacitor on chip for driving, the power issue of solution VDMOS field effect transistor improves the reliability of using.

Description of drawings

Fig. 1 is an electrical block diagram of the present utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is further described.

Electric bicycle brushless controller as shown in the figure, comprise brushless electric machine control chip IC1, brushless electric machine control chip IC1 adopts brushless special chip MC33035, the output of brushless motor controller IC1 connects 3 tunnel chip for driving IC2, IC3, IC4, chip for driving IC2, IC3, IC4 adopts IR2103,2 pin of brushless electric machine control chip IC1 are connected with the 2 pin high level inputs of chip for driving IC2,21 pin of brushless electric machine control chip IC1 are connected with the low level input of 3 pin, inverter all is set between the two-way input circuit, 1 pin of brushless electric machine control chip IC1 is connected with the 2 pin high level inputs of chip for driving IC3,20 pin of brushless electric machine control chip IC1 are connected with the low level input of 3 pin, inverter all is set between the two-way input circuit, 24 pin of brushless electric machine control chip IC1 are connected with the 2 pin high level inputs of chip for driving IC4,19 pin of brushless electric machine control chip IC1 are connected with the low level input of 3 pin, and inverter all is set between the two-way input circuit.4,5,6,8 pin of brushless electric machine control chip IC1 connect motor Hall element 1, external power source provides working power VCC for each chip after by voltage stabilizing chip IC 5 lowering and stabilizing blood pressures, connect bootstrap capacitor respectively between 6,8 pin of chip for driving IC2, IC3, IC4, be connected isolating diode between 8 pin of chip for driving IC2, IC3, IC4 and the working power VCC, 6 pin of chip for driving IC2, IC3, IC4 connect U, V, the W phase of motor 2 respectively.

MC33035 is a high-performance monolithic brushless direct current motor controller, this controller includes the rotor-position decoder that can be used for correct rectification sequential, and the reference level that can compensate sensor temperature, it also has the saw-toothed oscillator of a programmable frequency, an error amplifier, a pulse modulation comparator, three open collectors and drives output and three big electric current totem pillar bottom followers that are highly suitable for driving power field effect transistor (MOSFET) simultaneously.In addition, MC33035 also has undervoltage lookout function, have simultaneously delayed latch shutdown mode between optional time by characteristics such as all current limiting characteristic and internal heat shutoffs.Its typical Electric Machine Control function comprise open loop speed, forward or backwards and operation enable etc.1,2,24 pin are that BT, AT, three open collectors of CT drive output, are used to drive the external power switching tube.3. pin is used to change motor steering for the input of Fwd/Rev forwards/reverse.4,5,6 pin are SA, SB, three transducer inputs of SC, are used to control the rectification sequence.Input logic 0 is defined as less than 85mV, and logical one is for being higher than 115mV.The rotor-position decoder of MC33035 inside is mainly used in three transducer inputs of *, so that system can correctly provide high-end and low side drives the correct sequential of importing.The transducer input can directly link to each other with open collector type hall-effect switch or photoelectrical coupler.In addition, this circuit also includes pull-up resistor, the TTL compatible level that its input threshold representative value is 2.2V.7 pin are Output Enable output enable, and high level is effective.When this pin is high level, motor is rotated.8 pin are the output of Reference Output reference voltage, and CT provides charging current for the oscillator timing capacitor, and for error amplifier provides reference voltage, also can provide power supply to transducer.9 pin are the input of Current Sense Noninverting Input current detecting homophase.In a given cycle oscillator, can end to export switch conduction with respect to pin one 5 for the signal of 100mV for one.Usually this pin is connected to the upper end of current detecting.10 pin are Oscillator oscillator pin, and frequency of oscillation is by timing element RT and the selected parameter value decision of CT.11 pin are Error Amp Nominverting Input error amplifier in-phase input end.Be typically connected on the Hall speed control.12 pin are Error AmpNoninverting Input error amplifier inverting input.Under the open loop applicable cases, this input is typically connected to the error amplifier output.13 pin are Error Amp Out/PWM Input error amplifier output/PWM input.Under the closed loop applicable cases, this pin is as compensation.14 pin are Fault Output failure output terminal.When following arbitrary or a plurality of condition satisfied, open-collector output was triggered and becomes low; Invalid transducer input code, current detecting surpasses 100mV, and low-voltage locking or heat are turn-offed.15 pin are Current Sense Inverting Input current detecting inverting input.Be used for providing with reference to ground to inner 100mV threshold voltage, this pin is typically connected to the bottom of current sense resistor.16 pin are Gnd, and this pin is used to control circuit that the earth point of a separation is provided, and can be used as with reference to turning back to power supply ground.17 pin are the Vcc positive supply.Vcc is in the scope of 10V～30V, but the equal operate as normal of controller.18 pin are provided by this pin for the high terminal voltage that the Vcc bottom drives output.Working range is from 10V～30V.19,20,21 pin are that CB, BB, these three totem pillar bottoms of AB drive output, are designed to directly drive the exterior base power switch pipe.22 pin are 60 °/120 ° Select, and the electric state of this pin can determine control circuit to be operated under the sensor electrical gas phase position input state of 60 ° (high level states) or 120 ° (low level states).23 pin are the Brake output enable, and this pin allows motor operation when low, and motor operation stops when high.

5, the 7 pin outputs of chip for driving IC2, IC3, IC4 connect the upper and lower VDMOS field effect transistor that IRF3205D is set respectively, key issue is, when last pipe conducting, drain electrode and source potential are approximately equal to the positive source current potential, keep the pipe conducting, the tube grid current potential is higher than about positive source current potential 12V, has just solved by an external isolating diode and a bootstrap capacitor.Instantly manage when pipe ends in the conducting, the isolating diode conducting, charging bootstrap capacitor, both end voltage is near supply voltage; Instantly pipe is when last pipe conducting, and isolating diode ends, and the electric charge that bootstrap capacitor stores is given last tube grid power supply, and current potential is much higher than the positive source current potential, makes to guarantee and hold conducting.

Claims

1. electric bicycle brushless controller, it is characterized in that comprising brushless electric machine control chip IC1, the output of brushless motor controller IC1 connects 3 tunnel chip for driving IC2, IC3, IC4,4 of brushless electric machine control chip IC1,5,6,8 pin connect motor Hall element (1), external power source provides working power VCC for each chip after by voltage stabilizing chip IC 5 lowering and stabilizing blood pressures, chip for driving IC2, IC3,6 of IC4, connect bootstrap capacitor between 8 pin respectively, chip for driving IC2, IC3, be connected isolating diode, chip for driving IC2 between 8 pin of IC4 and the working power VCC, IC3,6 pin of IC4 connect the U of motor (2) respectively, V, the W phase.

2. electric bicycle brushless controller as claimed in claim 1,2 pin that it is characterized in that described brushless electric machine control chip IC1 are connected with the 2 pin high level inputs of chip for driving IC2,21 pin of brushless electric machine control chip IC1 are connected with the low level input of 3 pin, and inverter all is set between the two-way input circuit.

3. electric bicycle brushless controller as claimed in claim 1,1 pin that it is characterized in that described brushless electric machine control chip IC1 is connected with the 2 pin high level inputs of chip for driving IC3,20 pin of brushless electric machine control chip IC1 are connected with the low level input of 3 pin, and inverter all is set between the two-way input circuit.

4. electric bicycle brushless controller as claimed in claim 1,24 pin that it is characterized in that described brushless electric machine control chip IC1 are connected with the 2 pin high level inputs of chip for driving IC4,19 pin of brushless electric machine control chip IC1 are connected with the low level input of 3 pin, and inverter all is set between the two-way input circuit.