An actuator driving device includes: first and second half bridge circuits driven according to modulated drive signals having an inverted relationship, generates a drive voltage for an actuator by switching a DC voltage, and outputs the drive voltage to the actuator; a current detection resistor which generates a current detection signal corresponding to current flowing through a series circuit including first and second switching elements and a series circuit including third and fourth switching elements; a hold circuit which holds the current detection signal from the current detection resistor and generates an output signal; a comparator which compares the output signal with a target amplitude signal to generate a comparison result signal; a multiplier which multiplies the comparison result signal and the drive signal to generate a multiplication result signal; and a PWM modulator which performs PWM modulation according to the multiplication result signal to generate a modulated drive signal.

A first electric stator surrounds a first electric rotor and is configured to cause the first electric rotor to rotate or generate electricity in the first electric stator when the first electric rotor rotates. The first electric stator includes a first set of electric windings. A second electric stator surrounds the second electric rotor and is configured to cause the second electric rotor to rotate or generate electricity in the second electric stator when the second electric rotor rotates. The second electric stator includes a second set of electric windings. The second electric stator is electrically coupled to the first electric stator. A controller is electrically coupled to both the first electric stator and the second electric stator. The controller is configured to exchange an electric current with a combination of the first electric stator and the second electric stator.

A first electric stator surrounds a first electric rotor and is configured to cause the first electric rotor to rotate or generate electricity in the first electric stator when the first electric rotor rotates. The first electric stator includes a first set of electric windings. A second electric stator surrounds the second electric rotor and is configured to cause the second electric rotor to rotate or generate electricity in the second electric stator when the second electric rotor rotates. The second electric stator includes a second set of electric windings. The second electric stator is electrically coupled to the first electric stator. A controller is electrically coupled to both the first electric stator and the second electric stator. The controller is configured to exchange an electric current with a combination of the first electric stator and the second electric stator.

An electric motor-driven parking brake of a motor vehicle can be released in an emergency by applying emergency current from a parallel emergency current source to the motors controlling the parking brake. The direction of the emergency current is selected to reverse the motors, i.e., release the parking brake.

An electric motor-driven parking brake of a motor vehicle can be released in an emergency by applying emergency current from a parallel emergency current source to the motors controlling the parking brake. The direction of the emergency current is selected to reverse the motors, i.e., release the parking brake.

A power converter for an electric power system comprises a switching circuit (102) for supplying, in a first operating mode of the power converter, voltages for driving a rotating electric machine. The power converter comprises a contactor system (110) and a controller (109) for using, in a second operating mode of the power converter, the switching circuit and at least one of windings (115) of the rotating electric machine as a voltage-decreasing direct voltage converter between direct voltage terminals of the power converter. Therefore, the switching circuit of the power converter can be utilized both for driving the rotating electric machine and, for example, for charging a battery element connected to a direct voltage terminal of the power converter.

Systems and methods are provided for detecting anomalies, for instance, user-caused scanning anomalies, which occur during scanning transactions. Scanning-related events may be detected by a scanning device and notifications of such events may be transmitted from the scanning device to a point-of-sale (POS) host device coupled therewith. In aspects, the notifications transmitted to the POS host device include a unique code (e.g., a barcode or label) that is indicative of the corresponding event. Responsive to receipt of the event notifications and the nature thereof, the POS host device may initiate one or more anomaly detection actions.

A power tool includes a motor and a power supply for supplying power to the motor. A driving circuit is connected to the motor. A voltage detection unit is used for detecting the voltage of the motor. A controller is configured to perform the following operations: if the motor voltage is greater than or equal to a preset voltage, the driving circuit will apply a voltage to the motor with a second slope, wherein the value range of the second slope is from 0 to 0.3. The disclosure also discloses a control method for starting under load of a power tool.

This power output device is provided with: a field winding; a motor having a plurality of star-connected motor windings composed of three or more phases; a capacitor; an inverter circuit configured to perform power conversion on the power supplied from the capacitor and to supply the converted power to the motor windings; a battery connected to the field winding; and a control unit. The inverter circuit has a plurality of switching element pairs that correspond to the respective motor windings. The capacitor is connected to a positive bus bar and a negative bus bar. The field winding is connected to the positive or negative bus bar and to a neutral point of the motor. The control unit is configured to control the switching element pairs so as to charge the capacitor by boosting the voltage of the battery and to supply a direct current to the field winding.

A vehicle includes an electric motor, a storage battery which supplies power to the electric motor, and a power line which configures a power transmission path between the electric motor and the storage battery. The power line is arranged to extend in a front-rear direction of the vehicle along a bottom surface of the vehicle. A part of the power line is covered by a protection member from below with a gap between the power line and the bottom surface. A fixing point of the protection member to the bottom surface is positioned on a front side of the protection member and on an outer side of the protection member in a vehicle width direction.