Zhongshan Broad-ocean Motor Co., Ltd.

Wolong Electric Group Co. Ltd.

Whirlpool Corporation

Great Lakes Electric, LLC

Wolong Electric Group Ltd.

Zheng Zhang

Yong Zhao

Jizhong Wang

Yiqiao Zhou

Ze Jiang

Radu Bojoi

Scott D Slabbekoorn

Xiansheng Zhang

Dingsheng Lin

Steve J Cook

Yifeng Yu

Tao Xie

Mingpan Pan

Ge Hu

Ronghua Bi

Hairong Sun

Gregory M Garstecki

Mark Mingjun Xie

Ali R Buendia

Weican Yan

Huangsheng Xu

Liyang Sun

Song Chi

Daniel C Conrad

Jie Liu

Hailing Li

Qianjie Ye

Jiyi Sun

Wangyong Liu

Shudong Zhu

Changping Yang

System and method for robust sensorless control of permanent magnet assisted synchronous reluctance (PM-SyR) motor. The system and method includes startup control of a motor with known rotor position/speed, but unknown rotor magnetic polarity of a motor exhibiting rotor magnetic anisotropy or saliency. The system and method includes a rotor characteristic detection method for a PM-SyR motor that detects rotor magnetic polarity based on the variation of the inductance that is caused by the leakage flux paths in the rotor barrier bridges and utilizes the detected rotor magnetic polarity for improved motor startup.

System and method for permanent magnet assisted synchronous reluctance motor control from zero or low speed

An electronic starting switch assembly and control methods for a dryer having a split-phase induction motor. The assembly comprises a microcontroller unit (MCU) configured to execute a control method that dynamically manages the motor's operation by monitoring the forward magnitude current. The MCU determines a stabilized startup forward magnitude current and calculates a crossover condition, allowing for precise control of the motor's transition to single-phase operation by disconnecting the auxiliary winding and connecting the heater element based on real-time forward magnitude current analysis and processing. The system can also monitor for overload conditions indicative of rotor speed drops and can re-engage the auxiliary winding to maintain motor performance. The assembly includes a housing with a heat-sink for efficient thermal management and environmental protection of electronic components. The disclosed method provides a robust solution for efficient dryer operation by ensuring accurate control of motor start-up, running conditions, and overload protection.

System and method for advanced electronic starting switch assembly for split-phase induction motors for domestic dryers

Systems and methods for robust control of a sensorless interior permanent magnet synchronous motor during severe operating conditions that causes motor parameter variation. A multi-model flux observer and a dynamic direct flux motor controller act in concert to generate driving commands. The flux observer transitions between providing flux-based rotor characteristic estimates based on different motor models. DHFI filtered currents can be utilized to obtain flux-based characteristic estimates using a motor magnetic model that are unaffected by motor parameter variations. The multi-model flux observer can be configured to transition between suitable estimation methods to reduce, minimize, or eliminate the effects of motor parameter variations.

Systems and methods for interior permanent magnet synchronous motor control

A robust starting system and method for an interior permanent magnet synchronous motor, suitable for commercial fan and blower drive applications. A comprehensive starting control process is provided that utilizes control flags to implement closed-loop control accounting for any pre-existing rotor movement, controlling the motor speed from an initial speed to a destination speed. A universal dqController provides selective configurability for collecting information regarding the initial state of the motor, as well as starting and operational motor control. Dynamic high frequency injection enables the use of HFI outside the normal standstill motor speeds by intelligently decoupling the high frequency and rotor movement portions of the stator current response.

Robust starting system and method for interior permanent magnet synchronous motor control

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 system and method for robust control of a sensorless interior permanent magnet synchronous motor. The system and method includes rotor characteristic detection to detect or estimate rotor position, rotor speed, and rotor magnetic polarity based on rotor magnetic anisotropy or saliency. Detecting rotor magnetic polarity allows determination of orientation of the rotor and, for a rotor in motion, direction of travel. A high frequency injection enables rotor position detection and an alternating carrier method enables detection of rotor magnetic polarity. The system and method can also include closed loop startup control from a standstill condition following detection of rotor characteristics.

System and method for interior permanent magnet synchronous motor control from zero or low speed

Systems and method for retrofitting heating, ventilation and air-conditioning (HVAC) systems with a variable speed electronically commutated motor (ECM) are provided. A speed setting controller is adapted to be connected with a furnace main control board and a motor controller, and provides detecting, speed setting, and control functions that are required to operate the ECM.

System and method for retrofitting HVAC systems

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

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

An indoor digital centralized controller system (DCCS) that is connected to a controller of an application system and accepts orders from the controller of the application system and controls at least one motor to work. The DCCS includes a power supply, a master control unit (MCU), a plurality of motor control modules, a programming port module, and an input interface. The power supply is configured to supply power for circuits. The MCU is connected to and communicates with the controller of the application system via the input interface. An outer computer is capable of rewriting control programs of the MCU via the programming port module. The MCU is connected to a motor via a motor control module. The motor includes a stator assembly, a rotor assembly, and a shell assembly. The stator assembly and the rotor assembly are coupled magnetically.

Indoor digital centralized controller system, air conditioning system comprising the same, and heating/cooling device comprising the same

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

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

Growing community of inventors

Saint Joseph, MI, United States of America

Zheng Zhang