761results 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.

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 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.

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

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 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.

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).

An electric vehicle (1) is provided with: a current collector (2); one or more charging devices (3) that are charged by an auxiliary power supply device connected to the current collector (2); a travel inverter (5) for driving the main motor (9); and a switch (61) that switches the connection between the charging device (3) and the travel inverter (5) from disconnection to connection when the current collector (2) is disconnected from the power supply.

To provide a vehicle that can reduce capacity of a sub battery.SOLUTION: A vehicle 100 comprises: a motor 10 for driving a vehicle body 100a; a main battery 20 for supplying electric power to the motor 10; a DC-DC converter 40 for converting a voltage of direct-current power; and a sub battery 50 for storing direct-current power of which the voltage has been converted by the DC-DC converter 40. The vehicle 100 is so configured as to supply direct-current power such that counter electromotive force from the motor 10 has been converted to the sub battery 50 via the DC-DC converter 40 when the main battery 20 fails.SELECTED DRAWING: Figure 1

An electric vehicle drive system (200) is provided with: a control device (120) for controlling motors (80, 81) for driving axles (40a, 40b) of a trolley (40) for driving an electric vehicle (150A); and a control device (121) for controlling motors (82, 83) for driving axles (41a, 41b) of a trolley (41). The control device (120, 121) includes an inverter (60) and a control unit (30) that controls the inverter (60). The control device (120) is housed in the housing (260), and the control device (121) is housed in the housing (261). Coolers (270, 271) for cooling by the traveling wind are respectively attached to the housing (260, 261). The control devices (120, 121) are distributed in the vicinity of the trolley (40) and the vicinity of the trolley (41).

To inhibit a high voltage part from being affected by damage when a casing of a unit is damaged.SOLUTION: A vehicle may include: a motor; a battery connected to the motor through a system main relay; a first unit connected to the battery through the system main relay; and a second unit disposed adjacent to the first unit on a first side in a vehicle front-rear direction. The first unit includes: a casing; an isolation transformer disposed within the casing; a first electric circuit that is disposed in the casing and electrically connected to a primary coil of the isolation transformer and with which the battery is electrically connected; and a second electric circuit that is disposed within the casing and electrically connected to a secondary coil of the isolation transformer. The first electric circuit is located at the other side in the vehicle front-rear direction relative to the isolation transformer in the casing.SELECTED DRAWING: Figure 4

A vehicle body management system for managing a vehicle body having a power train formed by a plurality of parts including a prime mover, the vehicle body management system including: a processing device that computes an efficiency value of a monitoring target, the monitoring target being the power train or a part or a subsystem of the power train, on the basis of information about the vehicle body, the information being sensed by a sensor provided to the vehicle body; and an output terminal that outputs the efficiency value of the monitoring target, the efficiency value being computed by the processing device, the processing device computing a load parameter of the power train, determining whether the load parameter is larger than a load determination value set in advance, computing the efficiency value of the monitoring target on the basis of input energy and output energy of the monitoring target on condition that the load parameter be larger than the load determination value, and recording the computed efficiency value of the monitoring target.

This invention relates to the field of rail transit and discloses a traction system, method, electronic device, and storage medium for rail transit vehicles. The traction system includes a traction inverter, a traction motor, a battery power supply path, an auxiliary converter, and a control unit. When the rail transit vehicle is in battery traction mode, the control unit controls the battery power supply branch to draw power from the battery, and the auxiliary converter boosts the obtained DC power before providing it to the traction inverter for conversion into three-phase AC power to drive the traction motor. Furthermore, when the rail transit vehicle is in external power supply traction mode, the control unit controls the traction inverter to draw power from the external AC power grid and converts the obtained electrical energy into three-phase AC power to drive the traction motor. This solution provides traction power for multiple scenarios, including battery traction mode and external power supply traction mode, allowing the vehicle to flexibly switch traction modes according to actual scenario requirements.

The invention provides a heat management system capable of effectively utilizing heat generated from a driving device and efficiently increasing the temperature of an electricity storage device. A heat management system (1) is provided with: a power storage device (173) that exchanges heat with a first flow path (170b); a drive device (133) that exchanges heat with a second flow path (130b); a heat sink (122) that is provided in a third flow path (130a); and a cooler (160) and switching devices (180, 190) that are provided in a fourth flow path (170a). When the temperature of the electricity storage device (173) rises, the switching device separates the third flow path from the other flow paths, forms a circuit in which the heat medium circulates in the first flow path and the second flow path, and forms a circuit in which the heat medium circulates in the fourth flow path.

The present invention addresses the problem of appropriately controlling a driving motor when traveling over a bump. This vehicle control device comprises a driving motor that is linked to a vehicle wheel, and an accelerator operation unit that is operated by a driver. The vehicle control device comprises a processor and a memory that are communicatively connected to each other and has a control system that controls the driving motor. As control modes for controlling the driving motor, provided are a torque control mode in which the motor torque is subjected to feedback control, and a speed control mode in which the motor rotational speed is subjected to feedback control. The control system switches the control mode from the torque control mode to the speed control mode if an operation amount of the accelerator operation unit exceeds a switching threshold value, and rotation of the driving motor is stopped.

A control device (50) for a power converter is to be applied to a system comprising a chargeable / dischargeable power storage device unit (30), coils (11U-11W, 72, 83, 84), and a power converter (20, 70, 80) that electrically connects the coils and the power storage device unit. The control device is provided with: a determination unit for determining whether or not the temperature of the power storage device unit is required to be increased; and a temperature increase control unit for, upon determination by the determination unit that the temperature of the power storage device unit is required to be increased, performing switching control for the power converter so as to repeat, in a prescribed period, one cycle composed of a coil charging mode in which the electric current amount in the coils is gradually increased and a coil discharging mode which is a mode after the coil charging mode and in which the electric current amount in the coils is gradually reduced, and so as to set the electric current amount in the coils to more than zero.

A program updating device according to the present invention comprises a control unit that carries out control such that when a power conversion device that drives an electrical apparatus loaded on a moving body is not operating, installation or activation of a power conversion device program for controlling the power conversion device is executed.

An object of the present invention is to provide a heat dissipation member and a power supply device that can effectively dissipate heat from the outer periphery of a circular circuit board case. [Solution] The problem was solved by a heat dissipation component for a circuit board mounted on a running body, the heat dissipation component comprising: a circular case that covers the circuit board; a refrigerant flow path that is provided on the outer periphery of the case and is formed between an inlet and an outlet; and a plurality of fins that extend linearly along the refrigerant flow path, and the outer periphery of the case is provided with a plurality of ribs from the upstream region to the downstream region for capturing the refrigerant that flows along the periphery.

To provide an electric motor driving device having a two-inverter configuration in which an output of an electric motor is stabilized and the continuity is maintained at a time of switching between a one-side driving mode and a both-side driving mode.SOLUTION: An electric motor driving device controls driving of an electric motor that has a winding wire to which two inverters connected to a power source are connected. A switching arbitration unit 303 determines switching between a one-side driving mode in which either one of two inverters 60, 70 is switchingly driven and a both-side driving mode in which both the inverters 60, 70 are switchingly driven, and arbitrates outputs of the respective inverters 60, 70 at the switching time so as to continue an output of the electric motor before and after driving mode switching. The switching arbitration unit 303 slightly changes a power amount of the inverter on the driving start side to increase from zero at the switching time from the one-side driving mode to the both-side driving mode, and slightly changes a power amount of the inverter on the driving end side to decrease to zero at the switching time from the both-side driving mode to the one-side driving mode.SELECTED DRAWING: Figure 4

To quickly start up a regenerative torque of a travel motor.SOLUTION: A vehicle control device has a first travel motor which is connected to a first wheel positioned on the front side in a travel direction, a second travel motor which is connected to a second wheel positioned on the rear side in the travel direction, and a control system for controlling the first travel motor and the second travel motor. When a distance to a collision prediction location or a collision object during traveling is less than a brake prediction threshold, the control system decreases a power running torque of the first travel motor and increases the power running torque of the second travel motor. When the distance to the collision object during traveling is less than a brake determined threshold smaller than the brake prediction threshold, the control system increases a regenerative torque of the first travel motor, and increases a regenerative torque of the second travel motor.SELECTED DRAWING: Figure 10

To obtain suitable travel feeling according to a travel scene.SOLUTION: A driving force control method controls drive force distributions (in other words, front wheel drive force Ff and rear wheel drive force Fr) for each of a front wheel motor 10f as a first drive source connected to a front wheel 11f, and a rear wheel motor 10r as a second drive source connected to a rear wheel 11r, and controls a pitch angle θ and a pitch rate ω. The method includes setting a pitch angle θ and a pitch rate ω in acceleration / deceleration at a correction pitch angle θ_c* and a correction pitch rate ω_c* according to the change of required acceleration afr of a vehicle 100 that is different from a basic pitch angle θ_b* and a basic pitch rate ω_b*, and further correcting the pitch angle θ and the pitch rate ω in acceleration / deceleration according to a travel scene of the vehicle 100.SELECTED DRAWING: Figure 8