The present invention provides a shunt series wound direct-current (DC) motor driving device and electric equipment. The shunt series wound DC motor driving device provided by the present invention includes: a shunt series wound DC motor; a DC power supply; and a chopper, wherein the chopper comprises m chopping units, a control signal comprises m unit control signals that respectively correspond to the m chopping units and are formed according to a preset phase stagger rule; each of unit control signals comprises w switching control signals corresponding to w switching control ends in the corresponding chopping units; the m first power output ends of all the chopping units and the m second power output ends of all the chopping units respectively correspondingly form m pairs of power output terminals; the m pairs of external terminals of the shunt series wound DC motor are connected with the m pairs of power output terminals in a one-to-one correspondence manner, wherein m is a positive integer that is not less than 2, and w is 1, 2 or 4.

A measurement circuit that is configured to provide a torque reading to a motion controller includes an offset controller and an amplifier. The offset controller is configured to read a temperature signal and to generate an offset voltage in response to receiving the temperature signal. The amplifier is configured to read a differential voltage from a differential sensor and to receive the offset voltage from the offset controller. The amplifier is also configured to add the offset voltage to the differential voltage after applying a gain to the differential voltage to generate an adjusted voltage. The amplifier is then configured to transmit the adjusted voltage.

A measurement circuit that is configured to provide a torque reading to a motion controller includes an offset controller and an amplifier. The offset controller is configured to read a temperature signal and to generate an offset voltage in response to receiving the temperature signal. The amplifier is configured to read a differential voltage from a differential sensor and to receive the offset voltage from the offset controller. The amplifier is also configured to add the offset voltage to the differential voltage after applying a gain to the differential voltage to generate an adjusted voltage. The amplifier is then configured to transmit the adjusted voltage.

A device for determining a torque in a drivetrain of an at least partially electrically operated motor vehicle is provided, having a first electric motor with a first rotor rotatably mounted in at least two rolling bearings spaced in the axial direction. The first rotor is operatively connected to at least a first vehicle wheel to be driven by the first electric motor. The first rolling bearing has a first angular position sensor and the second rolling bearing has a second angular position sensor, the sensors each generating a signal that represents the angular position of the first rotor at the particular bearing point. The signals are transmitted to a vehicle controller, in which the torque of the first electric motor applied to the first rotor is determined from the difference between the angular positions and is provided to control the motor vehicle.

A device for determining a torque in a drivetrain of an at least partially electrically operated motor vehicle is provided, having a first electric motor with a first rotor rotatably mounted in at least two rolling bearings spaced in the axial direction. The first rotor is operatively connected to at least a first vehicle wheel to be driven by the first electric motor. The first rolling bearing has a first angular position sensor and the second rolling bearing has a second angular position sensor, the sensors each generating a signal that represents the angular position of the first rotor at the particular bearing point. The signals are transmitted to a vehicle controller, in which the torque of the first electric motor applied to the first rotor is determined from the difference between the angular positions and is provided to control the motor vehicle.

The present invention discloses an H-3 silicon carbide PN-type radioisotopic battery and a manufacturing method therefor. The radioisotopic battery has a structure including, from bottom to top, an N-type ohmic contact electrode, an N-type highly doped SiC substrate, an N-type SiC epitaxial layer, and a P-type SiC epitaxial layer. A P-type SiC ohmic contact doped layer is disposed on a partial upper area of the P-type SiC epitaxial layer, a P-type ohmic contact electrode is disposed on top of the P-type SiC ohmic contact doped layer, a SiO.sub.2 passivation layer is disposed on an upper area of the P-type SiC epitaxial layer where the P-type ohmic contact doped layer is removed, and an H-3 radioisotope source is provided on the top of the SiO.sub.2 passivation layer.

The present invention provides a shunt series wound direct-current (DC) motor driving device and electric equipment. The shunt series wound DC motor driving device provided by the present invention includes: a shunt series wound DC motor; a DC power supply; and a chopper, wherein the chopper comprises m chopping units, a control signal comprises m unit control signals that respectively correspond to the m chopping units and are formed according to a preset phase stagger rule; each of unit control signals comprises w switching control signals corresponding to w switching control ends in the corresponding chopping units; the m first power output ends of all the chopping units and the m second power output ends of all the chopping units respectively correspondingly form m pairs of power output terminals; the m pairs of external terminals of the shunt series wound DC motor are connected with the m pairs of power output terminals in a one-to-one correspondence manner, wherein m is a positive integer that is not less than 2, and w is 1, 2 or 4.

An input cam having a recessed track for establishing a desired dwell time for a plurality of rotatable permanent magnets and an output cam having a recessed track for maximizing the harnessing of linear motion energy and to apply the harnessed energy to a rotary output are provided to improve the efficiency of a magnetic transmission.

An input cam having a recessed track for establishing a desired dwell time for a plurality of rotatable permanent magnets and an output cam having a recessed track for maximizing the harnessing of linear motion energy and to apply the harnessed energy to a rotary output are provided to improve the efficiency of a magnetic transmission.

The present disclosure provides position detector for an electric machine. The detector uses one or more proximity sensors, such as eddy current sensors, to detect features on the rotor of an electric machine. The detectable feature may be a spiral groove, which has a unique position at any given point around the circumference of the rotor. As the rotor is typically steel, the proximity sensors produce different output values depending on the degree to which they are aligned with the groove. As such, given that the groove has a unique position at any given location, the output of the proximity sensors is also unique for any given position. This enables the position of the rotor with respect to the sensors to be determined.