Sunonwealth Electric Machine Industry Co., Ltd.

Ming-Sheng Wang

Alex Horng

Ying-Ya Lu

Nan Long Tsai

Kun-Li Hsieh

Cheng-Te Liu

Ming-Fu Wu

Yung-Hui Wu

Szu-Ying Tu

A fan frame and a fan having temperature detecting element are provided. The fan frame includes a body and a circuit board. The body includes an inlet. The circuit board is installed around the inlet of the body. The temperature detecting element traverses the inlet. The first wire electrically connects the first contact end and the first external contact terminal. The second wire electrically connects the second contact end and the second external contact terminal. At least one of the first wire and the second wire includes a plurality of bending sections. By utilizing the bending sections of the first wire or the second wire, the length of the first wire or the second wire can be increased. Therefore, the influence in the temperature detecting element caused by the circuit board can be lowered and the error of the detecting temperature can be decreased.

Fan frame having temperture detecting element and fan having temperture detecting element

A motor includes a base, a stator, a rotor, a circuit board and a heat-conducting insulator. The base includes a cooling plate. The stator is coupled to the base. The rotor is rotatably coupled to the base and aligned with the stator. The circuit board is received in the base and electrically connected to the stator. The heat-conducting insulator is disposed between the cooling plate and the circuit board, and abuts with the cooling plate and one face of the circuit board.

Motor and cooling fan with a circuit board having a heat-conducting insulator

A rotation detection circuit of a dc brushless motor using a fixed bias voltage includes a transistor, and a signal adjuster. The signal adjuster is connected in series between the transistor and driver circuit of the dc brushless motor, for adjusting a signal output by the driver circuit to the according to a fixed bias voltage. The signal adjuster can be selectively supplied with a fixed bias voltage or connected in series with a zener diode. The signal adjuster can be adjusted according to the characteristics of the motor driver circuit, thereby enhancing the design of the rotation detection circuit.

Rotation detection circuit of a dc brushless motor using a fixed bias voltage

A safety-guard detective circuit of a fan motor includes a resistor being adapted to limit a large current input into the motor driver circuit, and a discharge member being adapted to perform grounding to discharge the large current limited by the resistor. The resistor and the release member are commonly connected to the third lead of the motor driver circuit.

Safety-guard detective circuit of a fan motor

A single-phase motor comprises a &lsqb;US79KUA&rsqb; two-phase motor driver IC, a conversion circuit, and a coil for a motor. The driver IC includes two outputs that are serially connected to the conversion circuit and then connected to the coil. The conversion circuit includes two transistors respectively connected two ends of the coil. The outputs of the driver IC respectively send out alternate on/off signals to respectively turn the transistors on and off, thereby controlling directions of current passing the coil. Thus, the coil generates alternative magnetic fields as a result of alternative directions of the current to thereby drive the rotor.

Single-phase motor with a conversion circuit

A fan motor having a two-step speed control includes a buffer circuit, a control voltage terminal, and a fan. The buffer circuit is mounted between a voltage source and a source terminal of the fan. The buffer circuit includes a resistor and a transistor. The control voltage terminal is connected to a transistor of the buffer circuit to control conduction or non-conduction of the transistor, thereby changing the voltage of the source terminal of the fan. The varying voltage waveforms are smooth linear waveforms such that rotating speed of the fan is increased or decreased gradually during switching between a low-speed operation mode and a high-speed operation speed.

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Kaohsiung, Taiwan

Ming-Sheng Wang