National Cheng-kung University

Hoyi Electronic Technology Co., Ltd.

Min-Fu Hsieh

Mi-Ching Tsai

Kai-Jung Shih

Lucio Jose Fernando Caceres Vera

Chi-Yang Chen

Shyy-Woei Chang

Wei-Ling Cai

Fu-Sheng Pai

Guan-Ming Chen

Po-Wei Huang

Jen-Hsiang Liu

Zheng-Xuan Wu

Bi-Sheng Wei

Tzu-Shien Chuang

Jung-Kun Chiu

Shang-Hui Shen

Hsin-Yu Chiu

An electronic rotary encoder is configured to be disposed on a vertical rotary shaft in a rotary object to obtain two encoded signals: a phase A signal and a phase B signal for calculating a rotational speed and a position. The electronic rotary encoder includes: at least one Hall element outputting Hall signals used as a square wave of the phase A signal; two capacitors, to respectively obtain a first voltage and a second voltage; two buffer gates, to respectively output waveform signals of a first X voltage and a second X voltage; two comparators outputting, a control signal through a latch; and an exclusive OR gate, where a direction signal and the control signal outputted through the latch are inputted to the exclusive OR gate, to obtain the phase B signal.

Electronic rotary encoder

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 commutation waveform generating circuit is provided. The motor commutation waveform generating circuit includes: an edge detection circuit, configured to receive sensing signals of the motor and derive a clock signal indicating a commutation switching point of the motor; an angle cutting circuit, controlled by the clock signal to generate an angle indication pulse indicating a rotation angle of the motor; a synthetic wave generating circuit, using the angle indication pulse to sequentially change waveform voltages corresponding to required angles and output them in segments; and a signal combining circuit, controlled by the clock signal to combine waveform voltage signals generated by the synthetic wave generating circuit, thereby obtaining a plurality of synthetic waveforms provided to a drive control system of the motor for drive control after pulse width modulation.

Motor communication waveform generating circuit

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 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.

Growing community of inventors

Tainan, Taiwan

Min-Fu Hsieh