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Electric brushless motor system hardware circuit design
by：Hoprio
2020-11-12
In order to determine whether brushless controller is normal, the output signal of each part of the measuring controller is in accordance with the standard, and be able to receive motor, turn signals, brake, judge whether the controller can realize the need to implement the functions, system to transfer to the detection of the controller and whether there is a stable brake handle 5 V voltage output, to determine the Angle of the controller, and the judgment hall line phase sequence and the corresponding motor power phase sequence.
Only position sensor signal and winding A, B, C properly connected to make the machine run normally.
Figure 1 as the circuit principle diagram of the overall design, system adopts STCl2C5410AD single chip microcomputer as main control chip.
STCl2C5410AD series MCU is macro crystal science and technology production of single clock cycle/machine (
1 t)
Of single chip microcomputer, is A high speed, low power consumption, strong anti-interference of A new generation of 8051 single chip microcomputer, is fully compatible with the traditional instruction code 8051, 8 ~ 12 times as fast, however, internal integration MAX810 special reset circuit, PWM, 4 road 8-way 10 high-speed A/D conversion, specifically for motor control strong interference occasions.
1 bridge rectifier circuit
because the controller work need is direct current, so you need to add a rectifier circuit. The system chosen is single phase bridge rectifier circuit. This circuit as long as four diode connected into mouth & other; Bridge & throughout; Structure, it has the advantage that the full-wave rectifier circuit. 2 the brakes and turn the signal detection
the brake signal the change of the high and low potential, is the controller to identify whether electric vehicles in the braking state, so as to determine whether the controller to the basis of electric power supply. As long as the brakes and turn the signal output terminal of receiving STCl2C5410AD MCU A/D conversion P16 and P17, can detect the output is normal. 3 controller Angle and phase sequence judgment
as shown in figure 2, the first judge A winding voltage output, plant protection unmanned aerial vehicle (uav) power system, the two light at the end of the coupling device connected to the controller, and A parallel up and up and down the tube when the tube conduction of A brushless motor, A high output voltage, makes the light coupling conduction. To output A voltage value, through STCl2C5410AD SCM P11 mouth on the tip of the A/D conversion to the microcontroller; When A tube conduction, A low output voltage, the light of the above decoupling conduction, so as to output A voltage value, through STCl2C5410AD SCM P10 mouth on the tip of the A/D conversion to the single chip microcomputer. B and C with the same connection. Output when the output is not directly, but through the optical coupling isolation after output, here's why: optical coupler to signal transmissions, the input and output electrical isolation was fully implemented, the output signal of the input no effect, strong anti-interference ability, stable work, non-contact, long service life, high transmission efficiency.
because the controller work need is direct current, so you need to add a rectifier circuit. The system chosen is single phase bridge rectifier circuit. This circuit as long as four diode connected into mouth & other; Bridge & throughout; Structure, it has the advantage that the full-wave rectifier circuit. 2 the brakes and turn the signal detection
the brake signal the change of the high and low potential, is the controller to identify whether electric vehicles in the braking state, so as to determine whether the controller to the basis of electric power supply. As long as the brakes and turn the signal output terminal of receiving STCl2C5410AD MCU A/D conversion P16 and P17, can detect the output is normal. 3 controller Angle and phase sequence judgment
as shown in figure 2, the first judge A winding voltage output, plant protection unmanned aerial vehicle (uav) power system, the two light at the end of the coupling device connected to the controller, and A parallel up and up and down the tube when the tube conduction of A brushless motor, A high output voltage, makes the light coupling conduction. To output A voltage value, through STCl2C5410AD SCM P11 mouth on the tip of the A/D conversion to the microcontroller; When A tube conduction, A low output voltage, the light of the above decoupling conduction, so as to output A voltage value, through STCl2C5410AD SCM P10 mouth on the tip of the A/D conversion to the single chip microcomputer. B and C with the same connection. Output when the output is not directly, but through the optical coupling isolation after output, here's why: optical coupler to signal transmissions, the input and output electrical isolation was fully implemented, the output signal of the input no effect, strong anti-interference ability, stable work, non-contact, long service life, high transmission efficiency.
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