Johnson Electric S.a.

Johnson Electric International Ag

En Hui Wang

Chi Ping Sun

Fei Xin

Shing Hin Yeung

Yue Li

Bao Ting Liu

Yan Yun Cui

Xiu Wen Yang

Shu Juan Huang

Li Sheng Liu

Yun Long Jiang

Chun Fai Wong

Guang Jie Cai

Xiao Ling Chen

Ken Wong

Hui Min Guo

Shu Zuo Lou

Ming Lei Zhang

Kwok Kuen Tse

Gang Qian

Xiao Ming Chen

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.

Magnetic sensor and an integrated circuit

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.

Magnetic sensor integrated circuit, motor component and application apparatus

The present teaching relates to a magnetic sensor comprising an input port to be connected to an external power supply, a magnetic field detecting circuit configured to generate a magnet detection signal, an output control circuit configured to control operation of the magnetic sensor in response to the magnet detection signal, and an output port. The magnetic field detecting circuit includes a magnetic sensing element configured to detect an external magnetic field and output a detection signal, a signal processing element configured to amplify the detection signal and removing interference from the detection signal to generate processed detection signal, and an analog-digital conversion element configured to convert the processed detection signal into a magnet detection signal, and the output control circuit is configured to control the magnetic sensor to operate in at least one of a first state and a second state responsive to at least the magnet detection signal.

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.

Motor component, application device and sensor integrated circuit

An electronic device and a magnetic sensor integrated circuit thereof are provided. The magnetic sensor integrated circuit includes a shell, a semiconductor substrate installed in the shell and a first to a third port extending from the shell. A rectifier and a position sensor are provided on the semiconductor substrate. The rectifier includes first and second output terminals and two input terminals respectively connected to the first and second ports. In a case that the first and second ports are positively or negatively connected to an external power supply, a voltage output by the first output terminal of the rectifier is higher than the voltage output by the second output terminal of the rectifier. The position sensor is connected to the first and second output terminals of the rectifier, and a magnetic field signal detected by the position sensor is output by the third port.

Electronic device and magnetic sensor integrated circuit

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.

Drive circuit for a permanent magnet motor

A magnetic sensor integrated circuit, a motor assembly and an application device are provided. The integrated circuit includes a housing, a semiconductor substrate, at least one input port and an output port, and an electronic circuit arranged on the semiconductor substrate. The electronic circuit includes a rectifying circuit, a magnetic field detection circuit configured to detect an external magnetic field and output magnetic field detection information, and an output control circuit connected to the rectifying circuit, and configured to control, at least based on the magnetic field detection information, the integrated circuit to operate in at least one of a first state in which a load current flows from the output port to an outside of the integrated circuit and a second state in which a load current flows from the outside of the integrated circuit to the output port. The load current flows through the rectifying circuit.

Magnetic sensor integrated circuit, motor assembly and application device

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; a magnetic sensor, configured to detect a magnetic field of a rotor and output a corresponding magnetic inductive signal; a first voltage drop circuit and a second voltage drop circuit connected in series between the first input terminal of the rectifying circuit and the first node, where there is a third node between the first voltage drop circuit and the second voltage drop circuit, and the first voltage drop circuit is connected between the first node and the third node; a switch circuit connected between the third node and a control terminal of the bidirectional alternating current switch, where the switch circuit includes a first terminal, a second terminal, a control terminal and a switch arranged between the first terminal and the second terminal; and a switch control circuit connected between the control terminal of the switch circuit and an output terminal of the magnetic sensor.

Motor driving circuit and motor component

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.

Magnetic sensor integrated circuit, motor assembly and application apparatus

An integrated circuit, a motor component including the integrated circuit and an application device having the motor component are provided according to embodiments of the present disclosure. The integrated circuit includes a housing, an integrated circuit die arranged inside the housing and multiple pins extended out from the housing. The integrated circuit die has a conductive back plate and an electronic circuit arranged on the conductive back plate. The multiple pins include an input pin and an output pin, each of the multiple pins has a lead frame inside the housing. And the conductive back plate is fixed to the lead frame of at least one ungrounded pin of the multiple pins in a manner of electrical insulation, thereby avoiding an short circuit for the integrated circuit due to an electrical connection between the conductive back plate and the lead frame fixed to the conductive back plate.

Integrated circuit, motor component and application device having the motor component

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.

The present teaching relates to a magnetic sensor that comprises a housing, an input port and an output port, both extending from the housing and the input port being connected to an external alternating current (AC) power supply, and an electrical circuit. The electrical circuit comprises an output control circuit coupled with the output port and configured to be responsive to a magnetic induction signal to control the magnetic sensor to operate in a state in which a load current flows through the output port when a predetermined condition is satisfied, and operate in another state when the predetermined condition is not satisfied. The operating frequency of the magnetic sensor is positively proportional to the frequency of the external AC power supply.

A drive circuit for an electric motor connected in series with an AC power source between a first node and a second node. The drive circuit includes a controllable bidirectional AC switch, an AC-DC conversion circuit connected in parallel with the controllable bidirectional AC switch between the first node and the second node, a position sensor configured to detect a position of a rotor of the motor, and a switch control circuit configured to control the controllable bidirectional AC switch to be conductive or non-conductive in a predetermined way, based on the position of the rotor and a polarity of the AC power source.

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Shenzhen, China

En Hui Wang