Electrical engineers Brushless dc motor controller failure

General electrical engineer pointed out that how to eliminate the small details of brushless dc motor controller failure On PIC16F72 MCU controller high speed brushless motor no-load current, generally at about 1.4 A, A, static current normal controller should be within the 50 ma. Local machine at about 1.8 A. Should first billboard lights flashing in seconds/time, when the control panel does not work. If not add the signs and signals are not flashing, you should check: when not in normal external plug if there is a short circuit, 1.5 V voltage is normal. Tin plate with or without a short circuit, etc.; 2. The single chip microcomputer voltage is 5 v 2 feet 3. Quartz crystal is working; 4. Light is damaged. Second, the current controller voltage adjustment Transferred to the current, 1. The current adjustment: adjust the length of the constantan (new program can adjust LM358 6 feet of the resistance of the (2 of R6 values range k3. 3 K. 500 w old program in 26 35 a good running effect, a new process has good effect in 22 a 28 a. Usually adjust power supply connection resistance (Ra can adjust the under-voltage point, (2) voltage regulation: voltage sampling circuit for 48 V or 36 V power supply to ground of two partial pressure resistance. With the ground connection resistance usually take 1.2 K under voltage value and the resistance value can be calculated by the following formula: Ra = 1.2 xv - 1.2 3 x3 / under-voltage V value of 40.5: example: using 48 V battery voltage. Note: the 1.2 and ground connection resistance. Type in motor part the 3 handle under-voltage AD value for SCM department. Undervoltage correspond: 41.04 V41.65 V41.75 V41.86 V42V when the under voltage value should be between 40.5 V42V adjustment when loaded with 1.2 K resistor and 82 k39k36k33k30k. Please note that the signal flicker, three, when the control panel on the single magnet acmotortrading.blogspot.com generator chip microcomputer can work (not turn the lights should be flashing) but it can't work normally. Rare flashing status listed below: 1. 

The weak signal control/local normal work about second; 2. Two slow flash circuit in the braking state; 3. The slow flash 3 times constantan to LM358 parameter wrong or open circuit; 4. Slow flash 4 times on the bridge to drive a fault to the output MOS 5. The slow flash 5 times under the bridge to drive to the output MOS have fault; 6. Slow flash 6 times 60 degrees 120 degrees of choice and motor hall phase sequence connection is wrong; Constantan too long or short circuit detecting the reference level of partial bottom (normal values for 20 K to 1.2 K partial pressure) 7. Slow flash 7 times run CLP through the great protection. 8. Slow flash 8 times undervoltage state 9. Flash twice waiting to turn the zero (electricity control speed function) Motor locked-rotor stop; 10. Flash 3 times. Hall line break line lacks or the motor does not match. 11. The motor rotates the lights flashing. Three other fault can cooperate with the above condition deduced maintenance: 1 motor does not turn: testing MCU 3 feet if the voltage is greater than 3.2 V voltage lacks A. Brake testing MCU 7 feet, B level connection is normal. High level brake as long as the voltage is higher than 2.. 5 v low braking when the voltage is lower than 2.0 VC control voltage is added to the MCU 5 feet; Lack of phase lead to can't output; D connector not according to good. The output and drive electric circuit fault, E when the above conditions are met. External force forcibly rotating brushless motor, the internal has obvious uneven resistance for MOS power tube damage, but there is more local damage of a category before driving triode.