688766
Stock code
Brushless electric wrenches are widely used in automobiles maintenance, machinery manufacturing, construction engineering and other fields. They can greatly improve work efficiency and reduce the labor intensity of operators, while ensuring the safe tightening of bolts and nuts.
Brushless DC motor is the core component in brushless electric wrench. Brushless DC motor adopts advanced electronic control technology, which controls current and voltage through electronic regulator to realize stepless speed regulation and stable output of the motor. The motor rotor of the brushless electric wrench consists of multiple pairs of permanent magnets with no direct physical contact with the fixing sub, resulting in less friction loss, lower power consumption and longer life. The electric wrench solution based on PY32F003 of Puya Semiconductor can better control the motor to run stably and efficiently.
Brushless electric wrenches are usually powered by lithium batteries for portability and flexibility. They usually have adjustable torque output and can be used in different working environments, such as construction sites, workshops, repair stores and so on. The PY32F003 chip-based control of the electric wrench not only displays the power level of the lithium battery, but also has protection against faults such as over-current and over-voltage and under-voltage, which can effectively improve the life of the lithium battery and increase the user experience.
So the electric wrench controlled by PY32F003 has the advantages of low cost, high security, good stability, etc. We also provide customers with complete motor control solutions.
Features of electric wrench based on PY32F003:
Ø Using MCU's internal 24MHz main frequency, the speed loop response is faster.
Ø The DMA method acquires the ADC reverse potential, effectively avoiding out-of-step.
Ø Built-in comparator provides overcurrent protection and high integration to protect battery life.
Ø Puya sensorless motor starting algorithm with 100% starting success rate.
Ø Over-voltage, under-voltage, software over-current, blocking, phase loss protection.
Ø Power display, fault indication, high and low gear switching, reverse zero torque self-stopping, forward and reverse switching, work lighting.
The main control MCU is based on PY32F003 series microcontroller, which has balanced processing performance, absolute stability performance, rich peripheral interface and reliable safety performance. It provides mainstream solutions for various motor application scenarioses and meets the requirements of high reliability and stability of motors.
PY32F003 series MCUs can be widely used in a variety of motor scenarioses, such as motor control systems for electric wrench, fascia guns, high-speed blowers, violent fans, water pumps, pumps, electric toothbrushes, massagers, and so on.
Ø 32-bit ARM® Cortex® - M0+
Ø Maximum 64 Kbytes flash memory
Ø Maximum 8 Kbytes SRAM
Ø Up to 32 MHz operating frequency
Ø Communication Interface: SPI *1, USART *2, I2C *1
Ø Provides a 12-bit ADC, 2 comparators, an advanced timer (TIM1), 4 general-purpose timers (TIM3/TIM14/TIM16/TIM17)
Ø Operating Voltage: 1.7 V ~ 5.5 V
Ø Operating temperature range: -40 ~ 85°C
No. | Functionality | Parameters | Note |
1 | Forward and reverse functions | Motor forward and reverse | The main switch provides a commutation signal, and the control board controls the motor forward and reverse. |
2 | Brake function | Braking time < 1s | 1. E-brake |
3 | Speed control function | Speed range: 0~100% | The main switch provides VR speed control signal and the control board performs PWM speed control. |
4 | Task lighting | Illuminated lamp is always on during normal operation | Illumination |
5 | Time-delayed lighting | Normal operation after the switch is completely released, the LED will remain on and go out after a 10s delay. | |
6 | Battery level display | 1. Low battery light flashing: voltage <16.8V (flashing frequency 300ms uninterrupted) | |
7 | Battery overdischarge protection | ≤ 15±0.3V | When the battery voltage is lower than 15V±0.3V, the machine stops after a delay of 500±100ms. |
8 | MOS tube over-temperature protection | ≥ 105±3°C | When the temperature of the MOS tube is higher than 100±3, the machine will be shut down after a delay of 500±100ms. |
9 | Overcurrent protection | 40A | Downtime protection |
10 | Current limit | 35A | |
11 | Short circuit protection | ≥60A/30±10ms | Shutdown protection when load current is greater than 60A |
12 | Phase-to-phase short circuit | With motor phase line short circuit protection function | |
