CN1700584A

CN1700584A - Brushless DC machine double-drive single-chip microcomputer control device with built-in A/D converter

Info

Publication number: CN1700584A
Application number: CNA200510050449XA
Authority: CN
Inventors: 谭启仁
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-24
Filing date: 2005-06-24
Publication date: 2005-11-23

Abstract

This invention relates to sensor brush direct motor double drive single machine PWM control device, which belongs to single machine technique application and comprises A/D converter single machine and three rotor magnetic position sensor signals and is characterized by the following: the measuring of the sensor signals to control the brushless direct current motor phase adjusting speed and realizes the staring current limiting through the control on the output level and realizes the rotation control through the control on inside A/D converter output voltage.

Description

The brushless DC machine double-drive single-chip microcomputer control device of built-in A/D converter (1)

Technical field the invention belongs to singlechip technology in the DC MOTOR CONTROL Application for Field.

Before background technology the invention applying date, externally arranged D/A converter, Hall element and application-specific integrated circuit (ASIC) are adopted in the control of attached brushless DC motor of electric vehicle, but the defective that exists cost highly compatible difference and function to expand.The band brushless DC machine double-drive single-chip microcomputer control device that does not have simultaneously the built-in A/D converter that is used for the dual-driven electric car.

Certainly the brushless DC machine double-drive single-chip microcomputer control device that provides a kind of built-in A/D converter (1) of summary of the invention the invention.

The invention solves the technical scheme that its technical problem adopts: comprise the single-chip microcomputer of being with A/D converter and take from three rotor magnetic steel position sensor signals; Detect the measurement of two groups of three rotor magnetic steel position sensor signals by timesharing, the commutation speed governing of control brshless DC motor by the output level of control discharge circuit, realizes the restriction of starting current; By controlling the output voltage of built-in D/A, realize the control of rotating speed.Taking from two groups of three rotor magnetic steel position sensor signals is connected with the single-chip processor i/o input respectively; The single-chip processor i/o output is connected with discharge circuit with two reverse swing door circuit respectively, and the output of two reverse swing door circuit is connected with the control end of two groups of 6 power respectively, and built-in A/D converter is connected with the operational amplifier input.To take from the state of two groups of three rotor magnetic steel position sensor signals and the relation between two groups of 6 power tube conductings leaves among the EPROM of single-chip microcomputer with form.

The beneficial effect of the invention is: the invention employing single-chip microcomputer timesharing control realizes the control of two driving brshless DC motors and leaves a plurality of interfaces for the function expansion.Be widely used in the control of commutation, rotating speed and starting current of the brshless DC motor of the two rotating band Hall elements of all kinds of front and back wheels, add high-power, raising speed, energy efficient.

Appended drawings 1 is the electrical schematic diagram of the invention.

Embodiment is consulted Fig. 1.The invention single-chip microcomputer adopts U.S. MICROCHIP company 8-bit microcontroller, and present embodiment adopts the single-chip microcomputer PIC16C711 of built-in four road A/D modular converters.Delivery outlet P ₁Comprise I/O (1), I/O (2), I/O (3), I/O (4), I/O (5), I/O (6), the input with 7406 reverse swing door circuit is connected respectively.7406 output is six MOSFET power tube VF respectively ₁, VF ₂, VF ₃, VF ₄, VF ₅, VF ₆Control end be connected; Delivery outlet P ₂Comprise that I/O (7), I/O (8), I/O (9), I/O (10), I/O (11), I/O (12) are connected with the input of another 7406 reverse swing door circuit respectively.7406 output is six MOSFET power tube VF respectively ₁, VF ₂, VF ₃, VF ₄, VF ₅, VF ₆Control end be connected; Input port P ₀Comprise I/O (13), I/O (14), I/O (15), I/O (16), I/O (17), I/O (18), respectively with take from two groups three rotor magnetic steel position sensor signal H ₁, H ₂, H ₃, H ₄, H ₅, H ₆Be connected.Delivery outlet I/O (19) is connected with an input of LM324 operational amplifier by resistance.An input of LM324 operational amplifier passes through grounding through resistance.The invention detects three rotor magnetic steel position sensor signal H of two groups of back electromotive force by timesharing ₁, H ₂, H ₃, H ₄, H ₅, H ₆, and by i.e. three the rotor magnetic steel position sensor signal H of the commutation table among the EPROM that leaves single-chip microcomputer with form in ₁, H ₂, H ₃, H ₄, H ₅, H ₆State and 6 power tube VF ₁, VF ₂, VF ₃, VF ₄, VF ₅, VF ₆Relation between the conducting, by the control word that delivery outlet is sent, difference conducting VF ₁, VF ₂VF ₂, VF ₃VF ₃, VF ₄VF ₄, VF ₅VF ₅, VF ₆VF ₆, VF ₁Promptly realize the commutation of brshless DC motor.In the process of the normal operation of brshless DC motor, by controlling the output voltage of external D/A, i.e. the electric current of may command brshless DC motor, and then control rotating speed of motor.Single-chip microcomputer calculates rotating speed of motor by taking from the cycle of two groups of motor stator winding back-emf signals, and it with given rotating speed relatively, as be higher than given rotating speed, and then reduce output numerical value, reduce the electric current of motor, reduce its rotating speed to reach.

Claims

1, a kind of brushless DC machine double-drive single-chip microcomputer control device of built-in A/D converter (1) comprises the single-chip microcomputer of being with A/D converter and takes from three rotor magnetic steel position sensor signals; It is characterized in that detecting by timesharing the measurement of two groups of three rotor magnetic steel position sensor signals, the commutation speed governing of control brshless DC motor by the output level of control discharge circuit, realizes the restriction of starting current; By controlling the output voltage of built-in D/A, realize the control of rotating speed.

2, the brushless DC machine double-drive single-chip microcomputer control device of built-in A/D converter according to claim 1 (1) is characterized in that taking from two groups of three rotor magnetic steel position sensor signals and is connected with the single-chip processor i/o input respectively; The single-chip processor i/o output is connected with discharge circuit with two reverse swing door circuit respectively, and the output of two reverse swing door circuit is connected with the control end of two groups of 6 power respectively, and built-in A/D converter is connected with the operational amplifier input.

3, the brushless DC machine double-drive single-chip microcomputer control device of built-in A/D converter according to claim 1 (1) is characterized in that leaving among the EPROM of single-chip microcomputer with form taking from the state of two groups of three rotor magnetic steel position sensor signals and the relation between two groups of 6 power tube conductings.