Abstract:
A magnetic sensor integrated circuit, a motor component and an application apparatus are provided. The integrated circuit includes: an input port, an output port, a magnetic field detection circuit and an output control circuit. The magnetic field detection circuit detects an external magnetic field and outputs magnetic field detection information. The output control circuit enables, at least based on the magnetic field detection information, the integrated circuit to switch at least between a first state, in which a current flows from the output port to an outside of the integrated circuit, and a second state, in which a current flows from the outside of the integrated circuit to the output port.
Abstract:
A drive circuit for an electric motor having a wound stator and a permanent magnet rotor, includes a controllable bidirectional AC switch connected in series with a stator winding between two terminals for connecting to an AC power supply. First and second position sensors detect the position of magnetic poles of the rotor. A voltage regulating circuit is connected between the two terminals and the controllable bidirectional AC switch and configured to supply power to the first sensor during the positive cycle and to the second position sensor during the negative cycle of the AC power supply such that the controllable bidirectional AC switch is switched between a conductive state and a non-conductive state in a preset manner, thus enabling the stator to rotate the rotor in only one predetermined direction during start-up.
Abstract:
The present teaching relates to a method/apparatus for a magnetic sensor. The apparatus of the magnetic sensor resides in a housing and includes an input port and an output port, both extending from the housing. The apparatus also includes an electrical circuit which comprises a magnetic field detecting circuit, configured to detect an external magnetic field and output a magnetic induction signal that is indicative of information related to the external magnetic field, an output control circuit coupled between the magnetic field detecting circuit and the output port, and a state control circuit coupled with the output control circuit and configured to determine whether a predetermined condition is satisfied and signal the same to the output control circuit. When the predetermined condition is satisfied, the state control circuit is at least responsive to the magnetic induction signal to enable the output control circuit to control the magnetic sensor to operate in at least one of a first state and a second state. In the first state, a load current flows in a first direction from the output port to outside of the magnetic sensor. In the second state, a load current flows in a second direction opposite of the first direction from outside of the magnetic sensor into the magnetic sensor via the output port. When the predetermined condition is not satisfied, the state control circuit enables the output control circuit to control the magnetic sensor to operate in a third state.
Abstract:
A motor component and an integrated circuit for driving a motor are provided. The integrated circuit includes a housing, pins extended out from the housing, and a switch control circuit disposed on a semiconductor substrate. The semiconductor substrate and the switch control circuit are packaged in the housing. The switch control circuit is configured to generate a control signal for controlling a bidirectional AC switch to be switched on or switched off, based on a magnetic field polarity of a rotor of the motor, to control an energized mode for the motor.
Abstract:
The present teaching relates to a magnetic sensor residing in a housing. The magnetic sensor includes an input port and an output port, both extending from the housing, wherein the input port is to be connected to an external alternating current (AC) power supply. The magnetic sensor also includes an electric circuit which comprises an output control circuit coupled with the output port and configured to be at least responsive to a magnetic induction signal and the external AC power supply to control the magnetic sensor to operate in a state in which a load current flows through the output port. The magnetic induction signal is indicative of at least one characteristic of an external magnetic field detected by the electrical circuit and the operating frequency of the magnetic sensor is positively proportional to the frequency of the external AC power supply.
Abstract:
A sensor integrated circuit includes a rectifier, a power supply module, an output control circuit and a detecting circuit. The rectifier is configured to convert an external power supply into a first direct current power supply. The power supply module includes a voltage regulator configured to generate a second direct current power supply different from the first direct current power supply. The detecting circuit is powered by the second direct current power supply and configured to detect an inputted signal and correspondingly generate a control signal. The output control circuit is configured to control, in response to at least the control signal, the sensor integrated circuit to operate in at least one of a first state in which a current flows out from an output port and a second state in which a current flows in from the output port
Abstract:
A motor driving circuit and a motor component are provided. The motor driving circuit includes: a bidirectional alternating current switch connected in series with a motor across two terminals of an external alternating current power supply, where the bidirectional alternating current switch is connected between a first node and a second node; a rectifying circuit having a first input terminal and a second input terminal; a first voltage drop circuit connected between the first input terminal of the rectifying circuit and the first node; a switch control circuit connected between a control terminal of the bidirectional alternating current switch and an output terminal of the rectifying circuit; and a magnetic sensor, where an output terminal of the magnetic sensor is connected to a control terminal of the switch control circuit, and the magnetic sensor is configured to detect a magnetic field of a rotor of the motor and output a corresponding magnetic inductive signal. In this way, the motor with the motor driving circuit starts to rotate in a fixed direction every time the rotor is powered on.
Abstract:
A magnetic sensor integrated circuit includes an electronic circuit arranged on a semiconductor substrate, and input ports and first and second output ports extending out from a housing. The electronic circuit includes a magnetic field detection circuit and an output control circuit. The magnetic field detection circuit is configured to detect an external magnetic field and generate magnetic field detection information. The first output port outputs the magnetic field detection information to an outside of the housing. The output control circuit is configured to control, based at least on the magnetic field detection information, the integrated circuit to operate in at least one of a first state in which a current flows from the second output port to an outside of the integrated circuit and a second state in which a current flows from the outside of the integrated circuit to the second output port.
Abstract:
An application device, a motor component and a motor driver circuit are provided according to the invention. The motor driver circuit includes: a controllable bi-direction alternating current switch connected in series with a motor across an external alternating current power source; a switch control circuit configured to control the controllable bi-direction alternating current switch to be turned on or turned off in a preset manner; and a delay circuit configured to delay a turn-on for the controllable bi-direction alternating current switch for a preset time to decrease a phase difference between a current flowing through the motor and a counter electromotive force. The motor driver circuit can improve a power efficiency of the motor.
Abstract:
A magnetic sensor integrated circuit, a motor and an application apparatus. The magnetic sensor includes a magnetic sensor, a signal processing unit, an output control circuit and an output port. The magnetic sensor receives a constant current sense a magnetic polarity of an external magnetic field and output a differential signal. The signal processing unit amplifies the differential signal and eliminates an offset of the differential signal to obtain a magnetic field detection signal. The output control circuit control, at least based on the magnetic field detection signal, the magnetic sensor integrated circuit to operate in at least one a first state in which a current flows from the output port to the outside and a second state in which a current flows from the outside into the output port.