Zhongshan Broad-ocean Motor Co., Ltd.

Yiqiao Zhou

Yong Zhao

Zheng Zhang

Jizhong Wang

Ge Hu

Xiansheng Zhang

Mingpan Pan

Chuping Lu

Ronghua Bi

Hairong Sun

A blower system, including a permanent magnet motor and a wind wheel. The permanent magnet motor includes a stator assembly, a rotor assembly, and a motor controller. The rotor assembly includes a salient pole rotor including a rotor core and magnets embedded in the rotor core. The motor controller includes a microprocessor, a frequency inverter, and a sensor unit. The sensor unit inputs a phase current or phase currents, a phase voltage, and a DC bus voltage into the microprocessor. The microprocessor outputs a signal to control the frequency inverter which is connected to a winding of the stator assembly. The ratio between an air gap of the motor and the thickness of the magnets ranges from 0.03 to 0.065, and the ratio between the length of a pole arc and the length of the magnets ranges from 0.8 to 1.0.

Blower system and method for controlling the same

A method for controlling air volume of an electric device to be constant, the device being adapted to exhaust or supply air, the method including: A) establishing M constant air volume control functions Qi=F(n) corresponding to M air volume points CFMin the microprocessor of the system controller; B) allowing the microprocessor to receive or preset a target air volume IN-; C) starting the motor, when the motor operates in a stable state, comparing M air volume points CFMi with the target air volume IN-, and ensuring that the target air volume IN-falls within two known air volume points CFMi and CFMi&#x2212;1; D) using the two known air volume points CFMi and CFMi&#x2212;1 to calculate a constant air volume control function Q0=F(n) corresponding to the target air volume IN-by interpolation method; and E) controlling a motor parameter Q0 and a rotational speed n.

Method for controlling constant air volume of electric device adapted to exhaust or supply air

An HVAC control system for a household central air conditioning, including an HVAC system controller, a centrifugal blower motor, a compressor motor, and an axial fan motor. The HVAC system controller includes an HVAC microprocessor, a sensor, an interface unit for motor control, a power supply part, and a signal processing circuit. The interface unit for motor control includes an inverter unit and a rotor position detection unit. At least one of the centrifugal blower motor, the compressor motor, and the axial fan motor is a permanent magnet synchronous motor in the absence of a motor controller. The HVAC microprocessor drives the permanent magnet synchronous motor in the absence of a motor controller via the inverter unit. The rotor position detection unit sends a rotor position signal of the permanent magnet synchronous motor in the absence of a motor controller to the HVAC microprocessor.

HVAC control system for household central air conditioning

A method for measuring an air volume of a blower motor, including: a) establishing M constant air volume control functions Qi=F(n) corresponding to M air volume points CFMin a microprocessor of a motor controller; b) starting the motor, measuring a real-time rotational speed nand a parameter Qof the motor after the motor runs in a stable state, putting the parameter Qinto the functions Qi=F(n) to obtain multiple rotational speeds n, comparing the real-time rotational speed nwith the multiple rotational speeds ncorresponding to the multiple air volume points CFM, and determining a real-time detected air volume CFMwhich falls within two air volumes CFMand CFM; and c) calculating the real-time detected air volume CFMaccording to the two air volumes CFMand CFMand the rotational speeds nand nusing an interpolation method.

Method for measuring air volume of blower motor

A control method for constant airflow controlled by a direct power-controlled PM motor, wherein the PM motor is installed in an HVAC system to drive the rotation of a fan wheel, and wherein the PM motor has a stator component, permanent magnet rotor components, and a motor controller. In some embodiments, the motor controller includes an operation parameters sensing circuit and a microprocessor.

Direct power control for constant airflow control

A centralized motor controller for receiving commands from an application system controller and for controlling operation of a plurality of independent motors. The centralized motor controller includes: a power supply; a microprocessor; and an interface circuit for motor control including at least two inverter units and two rotor position detection units. The power supply supplies power for each circuit part. The motors are controlled by the microprocessor via the interface circuit for motor control. The number of the motors is equal to or more than three, in which, at least two of the motors are permanent magnet synchronous motors in the absence of a motor controller. The permanent magnet synchronous motors are driven by the microprocessor via the inverter units, respectively. Rotor position data of the permanent magnet synchronous motors are transmitted to the microprocessor via the rotor position detection units, respectively.

Centralized motor controller

Systems and methods for providing constant airflow based on direct motor power control and advanced motor system modeling are described. A power and speed of a motor may be determined based on static pressure in the system. A target airflow rate for the system may be obtained, and a target motor power that yields the target airflow rate in the system may be determined based on the determined speed of the motor and the obtained target airflow rate for the system. A determination of whether the determined motor power is approximately equal to the target motor power may be made, and the power of the motor may be adjusted when the motor power is not approximately equal to the target motor power.

Direct power control for constant airflow control with advanced motor system modeling

A device for detecting blockage of an air filter mesh, including: an air inlet, an air outlet, an air duct, a fan or a wind wheel, a blower motor, an air filter mesh, and a controller. The controller includes a main control board including: a microprocessor, an inverter circuit, and a motor operation parameter detecting circuit. The air filter mesh is disposed in the air duct. The motor operation parameter detecting circuit inputs a real time operation parameter into the microprocessor, and the output terminal of the microprocessor controls the inverter circuit. A function module of the microprocessor calculates a detected air volume according to the real time operation parameter. When the detected air volume is smaller than a preset air volume, the microprocessor determines that the air filter mesh is obstructed and outputs a signal to an alarm circuit to trigger an alarm.

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Zhongshan, China

Yiqiao Zhou