摘要:
A motor controller includes a power source unit providing a direct current output, a drive unit including a drive coil, first and second transistor units, a voltage drop component, and a processor. The transistor units are coupled to the power source unit and the drive unit, and enable electricity to flow through the drive coil in a first direction when the first and the second transistor units are in conducting and non-conducting states respectively, and in an opposite second direction when the first and the second transistor units are in non-conducting and conducting states respectively. The voltage drop component has a first end coupled to the drive unit and a grounded second end. The processor is coupled to a junction of the drive unit and the voltage drop component, and provides first and second pulse-width-modulated signals to the first and second transistor units, respectively.
摘要:
A controller includes a power source unit, a drive circuit, and a state control circuit. The drive circuit is coupled to the power source unit, and includes a drive coil and a switching transistor unit. The switching transistor unit is operable in one of a circuit-making state for making an electrical circuit between the drive coil and the power source unit so as to enable the drive coil to drive rotation of a rotor of a brushless direct current motor, and a circuit-breaking state for breaking the electrical circuit between the drive coil and the power source unit. The state control circuit is coupled to the power source unit, and includes a pulse width modulator, a sensing coil, and a control transistor coupled electrically in series. The state control circuit controls operation of the switching transistor unit according to magnetic position of the rotor relative to the sensing coil.
摘要:
A cooling module applied for liquid containers comprises: A cooling pipeline forms with an inlet and an outlet for refrigerant to flow through. The liquid pipeline conducts liquids to flow through a thermal-exchanging matrix. The thermal-exchanging matrix is made from metals such as copper or aluminum. The cooling pipeline and liquid pipeline are both installed inside the thermal-exchanging matrix. The thermal-exchanging matrix is pre-cooled and therefore being kept at a predetermined temperature by the thermal controller. Consequently, through flown in and out of the thermal-exchanging matrix, the liquid is cooled down in short time and therefore kept at the predetermined temperature.
摘要:
The invented establishment and execution system for enterprise activity management system comprises an enterprise activity flow planning system and an enterprise activity flow execution system. The enterprise activity flow planning system comprises: an activity flow planning module to allow users to define flows of a plurality of enterprise activities; an organization management module to allow user to define organizational structure of enterprise; an authorization management module to allow user to define functional relations of particular members in connection with particular activities; a data entity management module to allow user to define data entities; an enterprise resource management module to allow user to define enterprise resources; and a user interface to allow user to retrieve data from said enterprise activity management module, said enterprise organization management module, said authorization management module, said data entity management module and said enterprise resource management module and to edit the data.
摘要:
A cooling fan includes: a casing having a base wall and a surrounding wall that extends transversely from the base wall, and that has an inner wall surface and a top opening; a stator mounted on the inner wall surface of the surrounding wall; a shaft protruding from the base wall; a fan blade unit including an annular hub that is journalled rotatably to the shaft, a supporting ring that surrounds the hub, and a plurality of blades that extend between and that are connected to the hub and the supporting ring; a rotor mounted on the supporting ring; and a cover in the form of a circuit board mounted on the top end face of the surrounding wall for covering the top opening in the casing and including a substrate formed with a central opening.
摘要:
The bearing mainly includes an inner groove and at least a passage. The groove is arranged on an inner surface of the bearing and connected with a reservoir on one end of the bearing by the passage to induce the outflow lubricant backflow to the groove.
摘要:
A motor includes a base, a rotor unit and a driving unit. The base has opposite first and second surfaces. The rotor unit includes a magnet unit disposed on a rotatable magnet carrier to face the first surface of the base. The driving unit includes induction coils disposed on a circuit board, a sensor unit that is disposed on the circuit board and spaced apart from the induction coils and that defines a first reference line with the rotation axis, and a rotor positioning component disposed on the second surface of the base, extending along a second reference line, and capable of magnet attraction with the magnet unit for positioning the rotor unit relative to the sensor unit when the rotor unit stops rotating.
摘要:
The invention relates to a video card, an audio-video card, and an audio processing card, in which a digital signal processing unit performs a sound processing on a raw sound signal to thereby output a digital sound signal. Besides, a high quality multimedia interface transmission unit receives the digital sound signal and a video signal to thereby output a high quality multimedia signal. Accordingly, the central processing unit (CPU) load is reduced, and the high quality sound effects are provided.
摘要:
A heating device for a drinkable liquid includes a pipe connected to a liquid-storage unit, a heat-storage module including, the pipe mounted in the heat-storage module, a control valve mounted on the pipe and between the liquid-storage unit and the heat-storage module, a liquid outlet on an end of the pipe, and a control unit including a temperature sensor for detecting the temperature of the heat-storage module. The temperature sensor detects the temperature of the heat-storage module to control operation of a heater unit for maintaining the temperature of the heat-storage module not lower than a predetermined temperature. The control unit is operable to control opening of the control valve to allow the drinkable liquid in the liquid-storage unit to flow through the heat-storage module along the pipe for heat exchange, allowing the temperature of the drinkable liquid to reach the predetermined temperature in a short period of time.
摘要:
A power converter module provides a regulated direct current voltage to a load, and includes a rectifier, a metal thin film capacitor, and a voltage regulating circuit. The rectifier has input rectifier terminals coupled electrically to an external alternating current power source, and output rectifier terminals. The metal thin film capacitor interconnects one of the input rectifier terminals of the rectifier to the external alternating current power source. The voltage regulating circuit provides the regulated direct current voltage from the output rectifier terminals to the load.