1079results about "Propulsion using ac induction motors" patented technology

A simulation system of a railway system for a Medium-Voltage Direct Current (MVDC) distribution network includes: a computing device which stores a simulation program including a converter station model configured to simulate a converter station included in the MVDC distribution network and a train operation model configured to simulate an operation state of a train that is supplied with power from the converter station and runs; a converter controller which controls a DC / DC converter included in the converter station model; and a Hardware In the Loop Simulation (HILS) device which performs a simulation based on the converter station model, the train operation model, and the converter controller. Herein, the converter station model and the train operation model are executed in software by the HILS device, and the converter controller is connected to the HILS device and driven to control the converter station model.

A refrigeration cycle device includes: a compressor; a heat radiating unit that causes refrigerant to heat air supplied to a space inside a vehicle cabin; a decompression unit that decompresses the refrigerant; an outside air heat absorbing unit that causes the refrigerant to absorb heat from outside air; a waste heat absorbing unit that causes the refrigerant to absorb waste heat of a waste heat device; a shutter that opens and closes a passage for the outside air introduced into the outside air heat absorbing unit; and a control unit that closes the shutter when it is determined that an amount of waste heat of the waste heat device is larger than an amount of heat absorbed by the refrigerant in the outside air heat absorbing unit and the waste heat absorbing unit.

To provide a power conversion device and program that can reduce the pulsation of a current flowing through a power storage unit.SOLUTION: The power conversion device includes a motor 10, an inverter 20, a battery inter-switch 50, a bypass switch 60, a connection path 73, and a motor ECU 100. The motor ECU 100 performs switching control of a target switch, which is at least one of upper and lower arm switches SUH to SWL of the inverter 20 to make a current to flow through the connection path 73. When the motor ECU 100 performs switching control of two or more phase target switches, it performs phase shift processing to shift the switching timing of each of the two or more phase target switches to an on state.SELECTED DRAWING: Figure 1

An electric work vehicle includes a body, a travel device in the body, a motor to drive the travel device, an inverter to supply power to the motor, an electric component, a DC / DC converter to convert a voltage of power to be supplied to the electric component, a radiator to cool coolant, and a cooling path through which the coolant cooled by the radiator circulates through the motor, the inverter, and the DC / DC converter and returns to the radiator. The cooling path extends from the radiator, passes through the inverter, the motor, and the DC / DC converter in this order, and returns to the radiator.

A vehicle includes a vehicle body, drive wheels that are mounted to the vehicle body at two positions, which are right and left positions with respect to a traveling direction, and respectively have motors, and steerable driven wheels mounted to the vehicle body. A vehicle control device controls drive of the motors to control travel of the vehicle. The vehicle control device includes a thrust calculation unit that calculates a thrust produced by rotation of the motors at the drive wheels when the vehicle travels on a predetermined path, a center of gravity calculation unit that calculates a position of a center of gravity of the vehicle in a coordinate system whose origin is a center position between the drive wheels, based on the thrust, and a control unit that controls rotational speeds or moving velocities of the drive wheels based on the position of the center of gravity.

A motor driving apparatus includes: a power storage device; a motor; a first inverter; a second inverter; an external AC terminal; a third inverter including a DC terminal and an AC terminal; a transformer connected to the AC terminal of the third inverter; a first switch capable of switching the AC terminal of the first inverter to a state of being connected to either the first winding connection portion or the external AC terminal; a second switch capable of switching the AC terminal of the second inverter to a state of being connected to either the second winding connection portion or the transformer; and a third switch capable of switching the power storage device to a state of being connected to either the DC terminal of the first inverter and the DC terminal of the second inverter or the DC terminal of the third inverter.

A vehicle has a motor that drives the vehicle, a battery that allows supplying an electric power to the motor, and a power conversion device disposed between the motor and the battery. An execution command of ripple charging and discharging that alternately charges and discharges multiple times with the battery is output to the power conversion device when a temperature of the battery is lower than a predetermined threshold temperature, and the flow rate of the heating medium is controlled such that the flow rate of the heating medium is reduced compared with a case where the temperature of the battery is lower than the temperature of the heating medium when the temperature of the battery is higher than the temperature of the heating medium that exchanges heat with the battery while the ripple charging and discharging is executed.

An electric actuator includes an electric motor, a drive device that drives the electric motor to output a first rotary motion using power accumulated in a capacitor, and a motion converter that is coupled to the electric motor and converts the first rotary motion into a second rotary motion. The first rotary motion is forward and reverse rotary motions that are output by the electric motor as the drive device drives the electric motor to repeat forward rotation and reverse rotation. The second rotary motion is a unidirectional rotary motion. Regenerative electric power generated in the electric motor by the electric motor repeating the forward rotation and the reverse rotation is supplied to the capacitor.

A vehicle drive device is disclosed that includes a rotating electrical machine, a transmission mechanism, an inverter device, a case including a first case portion that houses the rotating electrical machine, and a rotor shaft to which a rotor is fixed. The rotating electrical machine and a pair of output members have a two-axis configuration. The transmission mechanism includes, coaxially with the pair of output members, an output gear drivingly connected to at least one of the pair of output members. The output gear is disposed so as to overlap each of the rotating electrical machine and the inverter device as viewed in an axial direction. The inverter device is disposed so as to overlap a first output member that is one of the pair of output members, as viewed in an up-down direction. The first output member is disposed so as to overlap an axis of the rotor shaft as viewed in a horizontal direction, and the inverter device is disposed below an uppermost position of the first case portion in a second direction.

The invention relates to the technical field of power supply, and provides a mobile charging intelligent rail highway power supply system and a power supply method thereof, which solve the problem that the existing power supply system has a single system and is difficult to meet the requirements of high efficiency, safety and flexibility, the mobile charging intelligent rail highway power supply system comprises a high-voltage power transmission line, a charging rectification station, a contact net, a pantograph and other core components, the innovation point lies in that an intelligent power supply management unit, a multi-system compatible unit and a contact network power supply unit are introduced, so that intelligent management, multi-system compatibility and real-time monitoring of the electric energy are realized; according to the invention, the power supply mode can be adjusted according to the external power supply mode, and the efficiency and safety of system operation are improved.

A vehicle drive device (100) includes a rotary electric machine (MG), a power transmission mechanism (GT), an inverter module (INV) configured to control drive of the rotary electric machine (MG), a power supply module (PWR) electrically connected to an onboard battery, a refrigerant circuit module (2) that defines at least part of a refrigerant circuit (20) through which a refrigerant for an onboard air conditioner circulates, and a case (9) including a first housing chamber (E1) that houses the inverter module (INV) and a second housing chamber (E2) that houses the rotary electric machine (MG) and the power transmission mechanism (GT). The power supply module (PWR) and the refrigerant circuit module (2) are attached to the case (9).

An apparatus comprises a power electronic energy conversion system comprising a first energy storage device configured to store DC energy and a first voltage converter configured to convert a second voltage from a remote power supply into a first charging voltage configured to charge the first energy storage device. The apparatus also includes a first controller configured to control the first voltage converter to convert the second voltage into the first charging voltage and to provide the first charging voltage to the first energy storage device during a charging mode of operation and communicate with a second controller located remotely from the power electronic energy conversion system to cause a second charging voltage to be provided to the first energy storage device during the charging mode of operation to rapidly charge the first energy storage device.

A vehicle drive device including a case, a rotary electric machine provided in the case and including power lines 1U, 1V, and 1W electrically connected to a power supply via a power converter (inverter IV), bus bars 7U, 7V, and 7W extending inside the case and joined to the power lines, a hydraulic pump (electric hydraulic pump 72), and an oil passage including ejection holes through which oil discharged from the hydraulic pump is ejected toward at least one of the power lines and the bus bars.

An electric drive device for driving a vehicle includes a drive unit for rotating drive wheels of the vehicle. The drive unit includes a plurality of system devices, a rotor that constitutes a motor and is common to each system device, and a housing that is long in a tubular shape in a direction in which a rotor shaft extends and that houses each system device and the rotor in a tubular space. Each system device has a stator winding that constitutes a motor, and an inverter electrically connected to the stator winding. The drive unit has a control unit that performs a switching control of each inverter to rotate the rotor and thereby rotate the drive wheels.

To configure, at reduced system cost, an on-vehicle charging apparatus that charges an on-vehicle DC power source with power from an external AC power source.SOLUTION: An on-vehicle charging apparatus 10 comprises an AC-DC converter 1 that converts power between AC power and first DC power, and converts power between the AC power and second DC power. The AC-DC converter 1 is a triple active bridge circuit comprising: a transformer T including a primary-side coil T1, a secondary-side first coil T21, and a secondary-side second coil T22; a primary-side bridge circuit 111 connected with the primary-side coil T1; a secondary-side first bridge circuit 112 connected with the secondary-side first coil T21; and a secondary-side second bridge circuit 113 connected with the secondary-side second coil T22. The primary-side bridge circuit 111 is formed of a bi-directional switching element.SELECTED DRAWING: Figure 1

To provide a controller of a hybrid vehicle which can suppress a relay selectively connecting between a power storage device and a control unit to drive a motor from being solid-phase bonded.SOLUTION: A controller of a hybrid vehicle comprises: a first motor which converts power of an engine into electric power; a second motor which is driven by the electric power generated by the first motor; a step-up converter which boosts output voltage of a battery to be output to respective motors; a relay which is arranged between the battery and the step-up converter; a low voltage capacitor which is arranged close to the battery side relative to the step-up converter; and a high voltage capacitor which is arranged close to respective motor sides relative to the step-up converter. In a case that conductive state of the relay continues for a predetermined time period or more, voltage of the high voltage capacitor is kept being higher than that of the low voltage capacitor (step S3) and then the relay is switched to a cut-off state (step S6).SELECTED DRAWING: Figure 4

This work vehicle is provided with: a fuel cell module having a fuel cell stack; at least one fuel tank accommodating fuel supplied to the fuel cell stack; a motor connected to the fuel cell module; the power output shaft is driven by the motor and is connected with a working tool; and a control device. The control device is capable of operating in a plurality of control modes. The plurality of control modes include a normal mode and an output limiting mode in which an upper limit value of power supplied from the fuel cell module to the motor is smaller than that in the normal mode. The control device changes the upper limit value of the electric power supplied to the motor in the output restriction mode in accordance with the type of the work tool connected to the power output shaft and / or the type of work performed by the work tool.

A power conversion apparatus includes a power converter configured to convert DC power supplied from a battery into AC power by switching control, and is configured to supply the AC power from the power converter to a rotary electric machine having windings. Further, the power conversion apparatus includes a control unit that performs temperature-increase control of the battery by performing switching control of upper arm switches and lower arm switches so that a current flows to the battery via the power converter and the windings. In the temperature-increase control while the vehicle is stopped, the control unit controls the current so that a current value of the rotary electric machine gradually increases within a current control range in which a torque of the rotary electric machine is less than an upper limit torque.

A control device of an electric hydraulic excavator sets or computes a rotation speed command and an allowable torque of an electric motor on the basis of a required rotation speed of the electric motor, and a sum of a suppliable electric power of a converter and a battery suppliable electric power. An inverter of the electric hydraulic excavator sets the allowable torque to a torque command if a calculated torque of the electric motor computed by multiplying by a gain, a difference between the rotation speed command and a rotation speed of the electric motor, exceeds the allowable torque, and sets the calculated torque to the torque command if the calculated torque does not exceed the allowable torque. The inverter supplies the electric power that can generate a torque corresponding to the torque command to the electric motor.

To provide a motor control device that is prevented from being unable to drive a motor even when a failure occurs in an inverter that controls a battery or a motor current.SOLUTION: A motor control device includes a plurality of semiconductor units including a semiconductor device for driving a motor and a battery for supplying a direct-current power to the semiconductor device. Each of the semiconductor devices of the semiconductor units is electrically connected to the motor in parallel.SELECTED DRAWING: Figure 1

A control device is applied to a system including a power storage unit, a plurality of power converters, a rotating electric machine having windings electrically connected to each of the power converters, and a heat transfer unit that transfers heat generated in at least one of the power converters to a target to be heated. The control device includes a determination unit that determines whether there is a temperature increase request for a target to be heated, and a control unit that, when it is determined that there is a temperature increase request, performs switching control of each power converter so as to pass AC d-axis and q-axis currents through the windings while maintaining a rotor of the rotating electric machine in a stopped state from rotating.

An electrical power converter includes a three-level inverter and a rotating electrical machine which includes windings. The three-level inverter includes first and second electrical storage devices, and switches. A positive side of the first electrical storage device is connected to a positive terminal of the storage battery. A negative side of the second electrical storage device is connected to a negative terminal of the storage battery. The electrical power converter also includes a connector and a controller. The connector achieves electrical connection of the electrical device with the three-level inverter and also achieves electrical connection of the electrical device with the storage battery through the neutral point. The controller works to control switching operations of the switches to achieve transmission of electrical power between the electrical device and the storage battery with the three-level inverter and the electrical device connected together through the connector.

The vehicle has an electric traction chain (3) for supplying drive torque to the wheels, a generator set (6) configured to generate a first supply voltage and mechanically disconnected from the wheels in all operating states, a battery storage assembly (21) configured to generate a second supply voltage, and an energy management system (20, 40) having a control unit that implements operating states of the vehicle including: (i) powering the electric traction chain (3) with the first supply voltage, (ii) powering the electric traction chain (3) with the second supply voltage, (iii) charging the storage assembly with a network voltage external to the vehicle and coming from a catenary (104), (iv) charging the storage assembly with the first supply voltage, and (v) charging the storage assembly with recovered voltage generated by the traction chain acting as a generator.

A locomotive propelled by a hybrid power system includes a boost mode of operation accessible on-demand by the operator. When a throttle is set to deliver maximum power from a diesel-electric engine, an operator can select actuators separate from the throttle to request that a control module deliver additional electrical power from batteries. The actuators may be soft keys or a touchscreen on a computer monitor or mechanical switches as part of the locomotive cab. The actuators provide boost notches of additional power beyond the typical eight notches on the throttle at least for transient conditions, and existing locomotives may be easily and inexpensively retrofitted with the actuators.

An electric working machine (1) includes: a machine body (2); a battery unit (30) mounted on the machine body; an electric motor (9) to be driven by electric power from the battery unit; a hydraulic device to be actuated by power from the electric motor; a working device (20, 10) to be actuated by a hydraulic pressure of a hydraulic fluid supplied from the hydraulic device; a controller (7) to control driving of the electric motor; a switching member (5c, 58) operable to be switched between a first position for permitting actuation of the working device and a second position for not permitting the actuation of the working device; and a fluid temperature detector (44) to detect a temperature (T) of the hydraulic fluid, and while the electric motor is being driven, when the switching member is switched to the second position and the temperature of the hydraulic fluid is within a predetermined allowable temperature range that is neither in a low temperature state nor a high temperature state, the controller (7) controls a rotation speed (R) of the electric motor to a predetermined first rotation speed (R1) corresponding to a stopped state of the electric motor.

To provide a power conversion device and program that can reduce the switching loss of an inverter.SOLUTION: The power conversion device includes a motor 10, an inverter 20, a battery inter-switch 50, a bypass switch 60, a connection path 73, and a motor ECU 100. The motor ECU 100 performs switching control of a target switch, which is at least one of upper and lower arm switches SUH to SWL of the inverter 20 to make a current to flow through the connection path 73. The motor ECU 100 reduces the number of phases of the target switch when the current to flow through the connection path 73 is small, compared to when the current to flow through the connection path 73 is large.SELECTED DRAWING: Figure 1

The invention provides an electronic control device capable of suppressing noise of a motor at the time of carrier frequency switching. An electronic control device for controlling an electric motor for driving a vehicle is provided with a switching condition storage unit (122), a driving load calculation unit (121), a switching condition determination unit (123), and a frequency control unit (124). A switching condition storage unit (122) stores switching conditions in which the rotational speed of the motor is lower than a predetermined lower limit value and the torque command of the motor is greater than a predetermined upper limit value. The travel load calculation unit (121) calculates the travel load (Lt) of the vehicle on the basis of the rotational speed (omega) of the motor and the torque command (Tc). A switching condition determination unit (123) determines, on the basis of a travel load (Lt) of a vehicle, a rotational speed (omega) of a motor, and a torque command (Tc), whether or not a switching condition is satisfied after a prescribed time has elapsed. When the switching condition determination unit (123) determines that the switching condition is satisfied, the frequency control unit (124) reduces the carrier frequency of the motor when the torque command of the motor is equal to or less than the upper limit value.

A power storage system has a battery, a three-phase motor in which coils of three phases are connected at a neutral point, an inverter connected on an electric power transmission path between the battery and the three-phase motor, and a DC power supply circuit connected to a connection portion positioned on an electric power transmission path between the inverter and the battery. The battery includes two power storages and a switch unit that switches between a first voltage state where the two power storages are connected in series and chargeable at a first voltage, and a second voltage state where the two power storages are connected in parallel and chargeable at a second voltage. The DC power supply circuit has a branch circuit connected to a coil of any one phase among the coils of three phases at a positive electrode side of the DC power supply circuit.

A vehicle control device (10) according to the present disclosure is provided with plant models (M1, M2) including drive-side inertia (JSM, JDM) calculated on the basis of inertia (JM) of a drive source of a vehicle (1) and load-side inertia (JSL, JDL). The vehicle control device (10) is provided with a calculation unit (11) and a control unit (12). The calculation unit (11) calculates estimated wheel speeds (ωLE, ωRE) on the basis of the plant models (M1, M2) and drive source angular velocities (ωLM, ωRM). The control unit (12) performs driving force control of the vehicle (1) using the estimated wheel speed (ωLE, ωRE).