Sensorless 3-phase no drama motor drive scheme

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Author：netwing Time：2024-04-28 Number Of Views：

Scheme of 3-phase brushless and sensorless motor controller module
This is a sensorless 3-phase brushless motor controller solution based on Toshiba TC78B009FTG, applied in server cooling fans, blowers, pumps, cordless vacuum cleaners, robot vacuum cleaners, etc.

Plan features:

1. Rated working voltage range: 15.5-21V, suitable for 18V lithium battery pack platform
2. Support: forward, reverse, braking, and standby functions to meet various control scenario requirements.
3. Support speed control through duty cycle PWM signal, analog voltage signal, and I2C.
4. Support various settings through the I2C interface.
5. No external MCU is required, as this IC has built-in NVM and can be used for speed setting.
6. Optional closed-loop or open-loop speed control.
7. It contains overcurrent detection protection, undervoltage locking, and over temperature protection to prevent potential safety hazards and ensure safer use.

TC78B009FTG characteristics

● Sensorless PWM drive
● Capable to drive Delta or Wye configured motors
● Operating voltage: 5.5 to 27V (absolute maximum rating: 30V)
● Predriver for high side and low side N-ch MOSFETs drive
● 8 selectable levels of gate drive current
● Built-in closed loop speed control with adjustable speed curve
● Motor speed control by analog voltage, PWM duty cycle, or I2C
● Serial interface (I2C) for various settings
● Standby mode (by STBY pin)
● Current monitor output (PHBF pin)
● CW/CCW control (CWCCW pin)
● Brake input pin (BRAKE pin)
● Rotation speed output (FG pin)
● Abnormality detection output (ALERT pin)
● Thermal shutdown (TSD)
● Under voltage lockout (UVLO)
● Charge pump low voltage detection (CPVSD)
● Output current limit (OCP)
● Over current detection (ISD)
● Lock protection
● Small QFN36 package

128 Microstep Stepper Motor Drive Module Scheme
Based on the Toshiba TC78H670FTG chip, it has a high resolution of 128 microsteps and can be powered by USB, battery, and standard 9-12V system components. It can be used in conjunction with a 1.8V interface to connect various hosts and microcontrollers. Mainly used in markets such as cameras, surveillance cameras, smartphones, and micro projectors.

Plan features:
1. Rated working voltage range: 2.5-18V
2. Maximum working current: 2A
3. Maximum Subdivision: 128
4. No current detection resistance.
5. An ultra-low standby current of 0.1mA.
6. Supports forward, reverse, and standby functions.
7. Smooth and noise free operation of the motor while reducing vibration.
8. Small component size saves wiring space on printed circuit boards (PCBs) and helps reduce costs.
9. It can be used in conjunction with a 1.8V interface to connect various hosts and microcontrollers.
10. Improve rotation angle accuracy through microstep control.
11. It contains overcurrent detection protection and overheating protection internally to prevent potential safety hazards and ensure safer use.

Sensorless 3-phase brushless motor drive scheme
Introduction to the plan:
A sensorless 3-phase brushless motor drive scheme based on Toshiba TB67B001FTG, which controls the speed of the brushless motor by changing the PWM duty cycle.
Application areas: Sweeping robots (edge and middle sweeps), small cooling fans for PC servers, and household appliances such as refrigerators.

Plan features:
1. Noisy operation: Reduce vibration and motor noise by using 150 ° wide angle rectification drive;
2. Sensorless drive: capable of controlling the rotation of three-phase brushless motors without the need for any Hall sensors;
3. High speed rotation: The maximum speed can reach 18000rpm (when using an 8-pole motor);
4. Working voltage: 5-12V, maximum working current: 2.5A;
5. Smaller PCB dimensions (26mm x 21mm);
6. Motor control: Control the motor speed, start and stop through the duty cycle PWM signal (TSP pin);
7. It has a speed feedback output signal FG.
TB67B001FTG Features:
1. Output current: Absolute maximum rated value: 3A;
2. Power supply: Absolute maximum rated value: 25V;
3. Adjustable output PMW duty cycle;
4. Optional control based on pulse duty cycle input or analog voltage input;
5. Leading angle control;
6. Overlapping commutation (120 °, 135 °, and 150 °);
7. Speed detection signal (FG-OUT);
8. Lock detection signal (LD-OUT);
9. Adjustable startup settings;
10. Forced commutation frequency control;
11. Over current protection (ISD), thermal shutdown (TSD), undervoltage lockout (UVLO);

Pin diagram:

Pin	function	illustrate
CN1 (power input)
1	VM	DC power supply＋
2	GND	DC power supply－
CN2 (Brushless Motor Drive)
1	COM	Brushless motor midpoint lead
2	U	Brushless motor U-phase
3	V	Brushless motor V-phase
4	W	Brushless motor W-phase
TSP (PWM input)
1	TSP	PWM signal

3-phase brushless motor drive scheme
Introduction to the plan:
A 3-phase brushless motor drive scheme based on Toshiba TC78B016FTG, which controls the speed of the brushless motor by changing the PWM duty cycle.
Application areas: Sweeping robots (side wheels), small fans used in household appliances and industrial equipment.
Product features:
1. Low noise and low vibration: Compared with square wave drive, sine wave drive motors have lower noise and vibration;
2. Low power consumption: Due to the small output resistance of the driver chip, the power consumption of the chip is relatively low when the motor is operating;
3. Intelligent phase control: Automatically adjust the phase of motor voltage and motor current to achieve optimal efficiency;
4. Working voltage range: 13.5V-16.8V, maximum working current: 2.5A;
5. Control the motor speed through the duty cycle PWM signal (TSP pin), with a target motor speed of 8000rpm;
6. Used for 3 Hall chips to detect and feedback position, achieving precise motor position control;
7. Smaller PCB dimensions (30mm x 23.5mm).

TC78B016FTG Features:
1. 3-phase full wave drive and sine wave PWM drive;
2. Optional LA advanced phase angle adjustment function;
3. Pulse duty cycle signal input/analog voltage input;
4. Motor start and stop: Control the motor start and stop by adjusting the TSPVSP foot;
5. Forward and reverse rotation of the motor: Control the forward and reverse rotation of the motor through CW/CCW high and low level inputs;
6. It has a speed feedback output signal FG-OUT;
7. Has a lock detection signal (LD-OUT);
8. It has functions such as overcurrent protection (ISD), overheating protection (TSD), undervoltage locking (UVLO), etc.

Pin diagram:

Notes	Pin	KYL-BLDC-T016_V1.0		Pin	Notes
PWM input	１	TSP	GND	１	Ground
Speed Feedback 2	2	FB2	VM	2	Motor power supply（13.5V-16.8V）
Speed feedback 1	3	FB1	W	3	Brushless motor W-phase
U-phase Hall signal input（+）	4	HUP	V	4	Brushless motor V-phase
V-phase Hall signal input (+)	5	HVP	U	5	Brushless motor U-phase
W-phase Hall signal input（＋）	6	HWP	RS	6	RS current detection
Ground	7	GND	DIR	7	Motor rotation direction setting
Hall power supply（＋5V）	8	VCC	BRK	8	Motor brake