An electric lifting frame includes a lifting pedestal and a remote control. The lifting pedestal includes a supporting base, a lifting rod detachably connected to the supporting base, and a transmission mechanism, a motor, a controller, and a power supply provided at the lifting rod. The motor is configured to effect extension and retraction of the lifting rod via the transmission mechanism. The controller is configured to control starting and stopping and a rotation direction of the motor. The power supply is configured to supply electric energy to the motor and the controller. The controller is further configured to determine a remaining capacity of the power supply and calculate a number of remaining available times of use according to the remaining capacity, a power of the motor, and a stroke of the transmission mechanism.

An improved power system architecture for a hybrid electric vehicle includes a power control unit including a motor inverter, a generator inverter, and a DC-to-DC converter, and vehicle power management (VPM) circuitry directly connected to each of the motor inverter, generator inverter, and DC-to-DC converter. In this arrangement, communication timing is greatly reduced, thereby allowing for feedforward control of the motor inverter, generator inverter, and DC-to-DC converter. The feedforward control enables the VPM circuitry to predict current influx or draw by a motor and determine the corresponding currents to provide to or from the generator and battery prior to or simultaneously with the actual current influx or draw by the motor. This improves vehicle dynamics and responsiveness, as well as enables complete recapture of braking currents and eliminates the need for a brake chopper resistor, thereby improving overall vehicle efficiency.

A power conversion device, mounted on a motor vehicle, has a battery, a power converter, a reactor and a control unit. The power conversion device boosts a battery voltage of the battery, and supplies a boosted voltage to a motor generator mounted on a motor vehicle. The power conversion device transmits electric power generated by the motor generator and supplies the generated electric power to the battery through the power converter. The power converter has an upper arm and a lower arm. The upper arm has upper arm side switching elements. The lower arm has lower arm side switching elements which are directly connected to the respective upper arm side switching elements. At least one of the upper arm side switching elements is composed of a MOS FET and at least one of the lower arm side switching elements is composed of an IGBT.

The invention discloses a control system for LRA, applicable to an LRA having a speed sensing coil. The control system comprises a signal amplifier, an excitation device, a flow controller, a processing unit, and a driver. The processing unit is connected to the signal amplifier, the excitation device and the flow controller, so as to stop output, output the excitation signal as a driving signal or process the induction signal from the signal amplifier into an appropriate system damping coefficient and output as a driving signal when the flow controller outputs a stop, excitation or braking state signal, respectively.

A motor driving device for driving a motor having multiple windings corresponding to multiple phases, respectively, may include: a first inverter including multiple first switching elements and connected to a first end of each of the multiple windings; a second inverter including multiple second switching elements and connected a second end of each of the multiple windings; a third switching element configured to connect/disconnect points, at which the number of turns of each of the multiple windings is partitioned based on a predetermined ratio, to/from each other; and a controller configured to control, based on the required output of the motor, an on/off state of the first switching elements to the third switching element.

The invention relates to a device and to a plurality of methods for transporting. One method includes moving a plurality of transport movement devices (14) along a guide track (22) by means of a linear motor system. A long stator (16) of the linear motor system has, along a portion of the guide track (22), a predetermined functional region. The method includes portion-wise varying of a magnetic field generation of the long stator (16) within the predetermined functional region (46) for successive transport movement devices of the plurality of transport movement devices (14). It is thus possible to achieve various advantages, such as for example prolonging the motor service life, preventing emergency shut-offs, increased performance of the long stator linear motor and/or allowing smaller dimensioning of the long stator (16).

A control circuit for a motor has a driving state and a braking state and includes a driving branch and a braking branch. The driving branch includes a branch formed by a stator winding and a rotor. The braking branch includes a branch formed by the stator winding, a braking switch, and an electrical energy storage component. The electrical energy storage component is configured to provide an electrical energy to the braking branch. When the motor is in the braking state, if the braking branch is detected as short-circuited, the connection between the stator winding and the rotor of the driving branch is turned on. Further provided is a power tool including the above control circuit.

An electromechanical system transfers rotational energy, torque and power in a powertrain coupled with a first, a second and a third machine for energy conversion (2, 3, 4). A superimposed gearing (1) includes a planetary gearbox (7) with a sun gear (8), coupled by a first shaft (5) transferring a torque to the first machine (2), and a planetary gear (9) coupled by a second shaft (6) transferring a torque to the second machine (3). The third machine (4) is configured as a three-phase synchronous machine. An internal gear (10) of the planetary gearbox (7) forms a rotor of the three-phase synchronous machine (4). The internal gear (10) is connected to a housing (15) of the planetary gearbox (7), and permanent magnets (11), exciting the three-phase synchronous machine, are arranged on the internal gear (10) and/or on the housing (15) of the planetary gearbox (7).

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 controller of a rotary axis includes: a storage unit that stores data of a braking distance for each rotation number of the rotary axis and provides a current braking distance S3 corresponding to a current rotation number of the rotary axis; and a deceleration command calculating unit that calculates a speed command V2 of the rotary axis on a basis of the remaining movement amount S2 and the current braking distance S3; in which the deceleration command calculating unit maintains the current rotation number of the rotary axis in a case in which a difference S4 between the remaining movement amount S2 and the current braking distance S3 is equal to or greater than a predetermined value, and starts deceleration of the rotary axis in a case in which the difference S4 is less than the predetermined value.