National Cheng-Kung University

Metal Industries Research & Development Centre

Tonic Fitness Technology, Inc.

Delta Electronics, Inc.

National Formosa University

Mi-Ching Tsai

Min-Fu Hsieh

Kai-Jung Shih

Liang-Yi Hsu

Ming-Chin Tsai

Bor-Jeng Lin

Guang-Miao Huang

Joseph Wu

Andy Wu

Lucio Jose Fernando Caceres Vera

Shyy-Woei Chang

Chien-Chin Huang

Tien-Chi Chen

Po-Wei Huang

Jia-Sheng Hu

Wei-Ling Cai

Cheng-Chi Huang

Shih-Wei Hsiao

Mu-Chuan Wu

Hong-Cheng Sheu

Ting-Chung Hsieh

Fu-Sheng Pai

Guan-Ming Chen

Cheng-Yen Chen

Guo-Jhih Yan

Ching-Shiong Tsai

Jing-Hui Wang

Lung-Jay Cheng

Shyh-Jier Huang

Ming-Yang Cheng

Chun-Ju Wu

Po-Wen Hsueh

Sheng-He Wang

Chung-Hsien Lin

Wu-Sung Yao

Po-Jen Ko

Li-Jung Tu

Chien-Jen Chen

Kwei-Yuan Chiou

Chuen-Fuu Wu

Ying-Rong Chen

Cheng-Hu Chen

Po-Kung Wang

Cason Wu

Zheng-Xuan Wu

Bi-Sheng Wei

Shang-Hsun Mao

Tsai-Jiun Ren

Jung-Kun Chiu

Shang-Hui Shen

Hsin-Yu Chiu

Tzu-Shien Chuang

Sheng-Zhan Yan

Jen-Hsiang Liu

Yao-Sheng Wu

Hung-Shiang Chuang

A method of estimating a d-q axis inductance of a permanent magnet synchronous motor includes the following steps. First, building an equivalent motor control block through enabling two of the three phases, and disabling the remaining one of the three phases, and locking a rotor. Afterward, incorporating a back EMF observer into a DC motor control block, and making the DC motor control block correspond to the back EMF observer by commanding an angular speed of the DC motor control block to be zero. Afterward, introducing the equivalent motor control block into the DC motor control block, and using the back EMF observer to estimate the back EMF, and repeating above steps taking turns to disable one phase so as to obtain three sets of motor inductances respectively. Finally, estimating the d-q axis inductance by introducing the three sets of equivalent motor inductances into an inductance relational equation.

Method of estimating D-Q axis inductance of permanent magnet synchronous motor

A motor and a rotor structure thereof are disclosed. The rotor structure includes a rotor core. The rotor core has a plurality of magnetic member units arranged around a periphery of the rotor core. Each magnetic member unit includes two first magnetic members and a second magnetic member. The two first magnetic members are obliquely arranged in a V shape relative to a center of the rotor core. The second magnetic member extends transversely between the two first magnetic members. Each first magnetic member has at least two permanent magnets that are arranged obliquely. The motor further includes a stator core covering the rotor core. The stator core has a plurality of stator windings arranged annularly. The stator windings correspond to the magnetic member units. The rotor structure has high structural strength, and the phenomenon of stress concentration is less obvious when the motor is running.

Motor and rotor structure thereof

A motor, a cooling device, and a cooling method are disclosed. The cooling device is mounted on a stator of the motor. The cooling device includes a sleeve and a spiral duct. A wall of the sleeve has a spiral groove extending along the sleeve. The sleeve is sleeved onto the stator. The spiral duct is mounted in the spiral groove. The spiral duct has a first spiral form corresponding to the spiral groove, so that the spiral duct is correspondingly installed in the spiral groove. The spiral duct has a second spiral form extending along the spiral duct. A twisted spiral cooling channel is formed along the spiral pathway. A cooling fluid flowing through the twisted spiral cooling channel is subjected to the continuously changing cross-section of the twisted spiral cooling channel to enhance the swirl intensity, thereby improving the convection heat transfer effectiveness.

Motor, cooling device having twisted spiral cooling channel and cooling method

A motor and a coreless stator coil winding unit thereof are disclosed. The coreless stator coil winding unit includes an overlapping coil winding assembly and a non-overlapping coil winding assembly. The overlapping coil winding assembly includes a plurality of first coils arranged annularly and a plurality of second coils arranged annularly. The first coils and the second coils overlap with a phase difference. The non-overlapping coil winding assembly includes a plurality of third coils arranged annularly. The third coils are each located between an adjacent one of the first coils and an adjacent one of the second coils. Thus, the back electromotive force constant and torque constant of the motor have a better performance.

Motor and coreless stator coil winding unit thereof

A motor and a rotating shaft cooling device thereof are disclosed. A rotating shaft of the motor is formed with an annular space. A shaft has a front end and a rear end. The shaft is a blind tube formed with a channel communicating with the annular space through a plurality of nozzles. The distance between the nozzles and the rear end is less than one-half of the length of the shaft. A cooling fluid flows through the nozzles to form a jet array to impinge on the inner wall of the rotating shaft to cool the rotating shaft, and flows back in the annular space to enhance the cooling effect, increase the heat exchange area, and improve the cooling effectiveness of the rotating shaft.

Motor and rotating shaft cooling device thereof

A motor and a spoke-type rotor structure thereof are disclosed. The rotor structure comprises a rotor core which has a plurality of spoke-type first magnetic members. Two oblique second magnetic members arranged in a V shape are provided between every adjacent two of the first magnetic members. A radius of the rotor core is R. A length of the first magnetic member is ls. A length of the second magnetic member is lv. A length component of the second magnetic member on the radius of the rotor core is x. An included angle between the first magnetic member and the second magnetic member is &#x3b2;. An included angle between every adjacent two of the first magnetic members is &#x3b1;. The parameters satisfy:, wherein&#xb7;cos(180&#xb0;&#x2212;&#x3b2;);90&#xb0;+&#x3b1;/2&#x3c;&#x3b2;&#x3c;180&#xb0;.

Motor and spoke-type rotor structure thereof

A circuit system and a circuit control method applied to a motor drive are disclosed. The circuit control method includes the steps of providing a phase-locked circuit unit and providing a PWM control unit. The phase-locked circuit unit enables a first carrier signal and a second carrier signal to have identical amplitudes and starting points. The PWM control unit compares the first carrier signal with a reference signal for controlling a switch. When a load current is independently supplied by at least one DC capacitor, a SVPWM control unit controls an inverter unit for the load current to be zero, thereby reducing DC voltage ripple, operation loss and transient voltage surge.

Circuit system and circuit control method applied to motor drive

A reluctance motor and a flux barrier structure thereof are provided. The flux barrier structure is disposed in a rotor, and the flux barrier structure has at least one flux barrier space and a plurality of support bars. The flux barrier space is formed by at least one surrounding wall of the rotor. The support bars are intersected with each other in the flux barrier space, and the support bars are extended from one side of the enclosure wall to the opposite side thereof.

Reluctance motor and flux barrier structure thereof

An electric power supply system cooperated by a battery and a super capacitor includes a power source module and a processing unit. The power source module includes an electric power transformer, a battery, and a super capacitor. The electric power transformer is electrically connected to the battery and the super capacitor. The processing unit is electrically connected to the electric power transformer for controlling the battery to charge the super capacitor, such that both the battery and the super capacitor supply electricity to the load, and such that electricity generated by the load can recharge the super capacitor. The electricity power supply system can avoid an increase of the working temperature of the battery.

Electric power supply system cooperated by a battery and a super capacitor

A current vector controlled synchronous reluctance motor and control method thereof, wherein the motor has a coil on each of the teeth. The coils form a U-phase winding, a V-phase winding and a W-phase winding. The phase windings receive a balanced three-phase current vector to induce closed magnetic field lines, such that the coils induce same magnetic poles adjacent to the rotor unit. Two short magnetic routes are formed along three adjacent teeth and the rotor unit. The efficiency of the reluctance motor is high.

Control method for controlling a current vector controlled synchronous reluctance motor

A magnetic coupling assembly has a supporting base, a first disk, a second disk and two piezoelectric actuators. The piezoelectric actuators are mounted between the supporting base and the first disk to drive the first disk to move along an axial direction of the supporting base and to adjust the air gap between the first and second disks. Each piezoelectric actuator has a housing, a pushing arm and at least one piezoelectric block. The pushing arm is mounted slidably in and extends out of the housing along a longitudinal direction parallel with the axial direction of the supporting base and has an end securely connected with the first disk. The at least one piezoelectric block is mounted in the housing and is attached to the pushing arm to push the pushing arm to move along the longitudinal direction.

Magnetic coupling assembly with an actively air gap adjustable mechanism

A magnetic-controlled actuator () with an auto-locking function for joints of a manipulation arm mainly includes an inner-layer stator (), an inner-layer mover (), an outer-layer mover (), an outer-layer stator (), and a fixing shaft (). The inner-layer mover (), the outer-layer mover (), and the outer-layer stator () have a plurality of permanent magnets, respectively. The fixed shaft () simultaneously penetrates through the inner-layer stator (), the inner-layer mover (), the outer-layer mover (), and the outer-layer stator () forming a coaxial arrangement. The inner-layer mover () rotates relatively to the inner-layer stator () to output power from the actuator (). Therefore, a cogging effect, which is produced due to interaction of the permanent magnets between the outer-layer mover () and the outer-layer stator (), is automatically produces a high cogging torque for the actuator (). Thus the actuator () provides a sufficient locking force to lock the non-stationary inner-layer mover () when a power failure occurs.

Magnetic-controlled actuator with auto-locking function for joints of manipulation arm

An energy transforming apparatus has a controllable magnetic power gathering device and a transforming device to transform the non-continuous kinetic energy into electrical power to store in the power storage assembly. The controllable magnetic power gathering device has a non-continuous moved or linear reciprocating moved input end, a continuous rotating output end and a controllable energy-adjusting end, etc, to transform the impulse momentum into the continuous kinetic energy with the differential motion and using the non-contacting magnetic wheel transmission assembly to protect the overload effect. The transforming device has an energy transforming assembly, a circuit adjustment assembly and a power storage assembly. The circuit adjustment assembly is electrically connected with the energy transforming assembly to control the energy transforming assembly to transform the kinetic energy into electrical power. Accordingly, the energy transforming apparatus can transform non-continuous kinetic energy into continuous movement and further into electric power.

Energy transforming apparatus

A manufacturing method for a stator structure and a micromotor having the same. The method includes: providing a flexible printed circuit (FPC) on which configuration positions of coil windings and a configuration position of at least one position signal generating unit are formed, wherein the FPC is further provided with an interface part; disposing the coil windings and the position signal generating unit on the coil winding configuration positions and the position signal generating unit configuration position, respectively, wherein the interface part is further provided with a connector pattern which is electrically coupled with the coil windings and the position signal generating unit; forming a FPC assembly including the coil windings and the position signal generating unit; and winding the FPC assembly to form the stator. The stator is applied in a micromotor in which a rotor, the stator and a case are disposed outward in a radial direction.

Manufacturing method for stator structure and micromotor having the same

A motor module includes a bearing housing having a loading base, an electric unit, a bearing, and a magnetic rotor unit disposed on the bearing. In addition, a protruding portion is extending from the loading base, and the electric unit includes a printed circuit board (PCB) and sensing elements, wherein the PCB is utilized for disposing the loading base thereon. Moreover, signal circuits and motor windings are formed on the PCB around the loading base, the sensing elements are disposed around the motor windings, and the bearing is disposed at the protruding portion. Besides, the magnetic rotor unit is disposed on the motor windings, keeping a gap with the PCB; therefore, when electric current passes the motor windings, the magnetic rotor unit and the motor windings generate a flux linkage induction, so as to drive the magnetic rotor unit to rotate relative to the PCB.

Motor module

Growing community of inventors

Tainan, Taiwan

Mi-Ching Tsai