Variable Fan Speed Drives, 180° Sinewave, No Position Sensor, Foc DC Fan Drive Technology.

Built in 2008,Zhouju is a leading company with RD team and strong OEM, ODM ability in the filed of HVAC BLDC motor drivers control and other HVAC control systems, Located in Xianlin Science Technology Zone, Hangzhou City, Zhejiang Province, Nearby Xixi wetland Scenic. Our products ranges are air conditioning, Refrigerator, Kitchen Appliance and water treatment and customized module to complete products. Approved By ISO 9001:2008 in 2013.Zhouju Cover 5000 square meters with 3 production lines and  300 employees,Our annual sales volume reached to 100 Million RMB to Guarantee High Quality, Our 25 RD department engineers cooperate with Jilin University on theory and algorithm, company achieved the foundation of academician workstation in 2015 with professor Guo-the great master on auto industry, we have completed test instruments include Voltage Method & automatic pulse measurement systems, constant temperature and humidity test, EMC test, AOI test, FCT,ICT test.
 
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Specification:
1 Sine Wave,sensorless,FOC (field-Oriented Control) Drving technology;
2 Single Phase solution with PFC, while 3 phase solution without PFC 
3 Multi-choice of speed control: 0-10V, PWM, FREQ, TTL_UART,485, ModBus
4 Special Control Strategy for Heat Pump system: double oil-return step, Multi Forbidden Frequency, System Pressure Balance, and so on.
5 Completed Protection: Over-current(software+hardware),High/Low DC Voltage,loss of synchronism,IPM overheat,Discharge Temperature Overheat and so on; 
6 Power Input: 0.2kW to 10kW
7 Max Current Limitation
8 Max Power Input limitation

Features
180°Sinewave, no position sensor, FOC DC fan drive technology.
12V-36V/310V/540V DC input, 220V/380V AC input, with CE, UL, CCC, TUV, ETL certificates.
Product series power range: 10W-10KW
The FOC solution brings low noise and low vibration.
Virous control modes of constant speed, constant torque, constant power and constant flow.
Diversity interface of 0-10V, PWM, TTL-UART, RS485, Modbus, CAN. And customized protocols against clients' requirements are available.
Compatible with various fan loads, mature closed-loop start technology both downwind or upwind, harmonic compensation technology, automatic air volume calibration, carrier frequency jitter technology.
SVPWM over-modulation technology improves the max running speed of the motor, reduce the device's loss and improve the efficiency.
Perfect protection mechanism: AC input overvoltage and undervoltage, DC bus overvoltage and undervoltage, SW and HW overcurrent, phase loss, step loss, overheating, communication failure, etc.
Several power limitation strategies through input current, voltage, phase current, temperature or others.

Application
Applicable for domestic, industrial and commercial axial fans and centrifugal fans.