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R4 Low-noise Brushless DC Motor Controller

R4 Low-noise Brushless DC Motor Controller

The R4 2204 Low-Noise Brushless DC Motor Controller is designed to deliver smooth, quiet, and highly reliable performance for compact and modern devices. With advanced noise-reduction technology, it significantly lowers operational sound while maintaining precise speed control and stable output. Its efficient driving system ensures reduced energy consumption, excellent heat management, and long-term durability. The controller’s compact structure makes it easy to integrate into space-limited products, while its intelligent protection features—such as overcurrent, overvoltage, and overheating safeguards—provide safe, worry-free operation.

APT-R4 Motor controller, Drive for a rated 4kW motor, widely suitable for electric motorcycle, ATV, and UTV, universal interface connector, Compatible with other controller products on the market. Windows software and mobile apps supported.

Technical Parameters

Application&Features

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Communication Interface VCU communication CANBUS 
(Isolation type, default 120Ω terminal resistor)
Motor-related Upper computer communication UART-TTL
Motor temperature sensing interface NTC/PTC（default parameters KTY83-122）
Position signal avoidance Hall encoder or magnetic encoder
Motor-type Permanent magnet synchronous motor,
DC brushless motor
Equipment Support Built-in Bluetooth capability
Software Adaptation APT eMotion
Executive Standard Electrical: GB/T18488 Salt Spray: GB/T2423.17
IIP Rating: GB/T4208-2017 Vibration: GB/T2423.10-2008
Input Rated Voltage 30-170 V Power devices vary across different voltage platforms
Control Mode Vector Control - FOC Sine Wave Modulation
Rated Power 3-5 KW Hardware configuration adjustable; heat sink adjustable
Peak Power 5-7.5 KW Hardware configuration adjustable
Maximum DC Input Current 200 A.peak Maximum withstand capacity of the DC bus
Rated Output Current 150-200 A.peak Motor phase current (peak); heat sink adjustable
Maximum Output Current 500 A.peak Motor phase current (peak)
Maximum Conversion Efficiency 98% - -


Orderable Specifications

Product
Model		 Voltage
range		 Motor phase
current limit		 DC Input current
Default limit Max. capability
R4.72S 30-85V 350A 120A 200A
R4.72M 30-85V 400A 135A 200A
R4.72L 30-85V 450A 150A 200A
R4.72U 30-85V 500A 170A 200A
R4.96M 30-118V 400A 150A 200A
R4.120M 30-135V 350A 120A 200A
R4.144M 30-170V 250A 80A 200A

Application Fields：
1. Pure electric and hybrid systems (traction or auxiliary):
• Road vehicle, utility vehicle, high-power electric motorcycle
• Off-road vehicles (tractors, bulldozers, special off-road vehicles, etc.)
• Electric boat, speedboat, and other fields of EV conversion

2. Design features:
The electrical system architecture is laid out in advance for automotive applications
Low voltage, high power, economical and efficient, very suitable for Off-road machinery


3. Technical features:
• Field-oriented vector control, in conjunction with APT-tuned algorithms, provides peak torque and optimal efficiency across the entire operating range
• Advanced Pulse Width Modulation technology provides efficient use of battery voltage, low motor harmonics, low torque ripple, and minimized switching losses
• Tunable to any BLDC or IPM motor. Fully programmable for optimal match to individual motor characteristics
• Field-Programmable, with FLASH downloadable main operating code
• Extremely wide torque/speed range, including full regeneration capability
• The unique software makes the system application easier than ever
• Benefit from the many decades of APT experience in the EV industry, quickly and simply decide your own proprietary PID parameter to differentiate your systems from your competition



  • Individual buyers
  • Corporate Procurement

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