摘要:
A state-of-charge equalizing device equalizes the state of charge of each of cells connected in series to form an assembled battery, and comprises charging/discharging circuits connected in parallel to the respective cells to discharge and/or charge the respective cells, voltage measurement circuits connected to the respective charging/discharging circuits to measure the voltages across the respective cells, and a control circuit. The control circuit comprises a unit calculating an equalization target voltage based on the measured voltages before the charge or discharge starts, a unit starting discharging/charging the cells having a voltage thereacross different from the target voltage, a unit correcting the target voltage to thereby calculate a corrected equalization target voltage for each of those cells based on the difference between the measured voltages before and at a certain time period after the charging/discharging, and a unit ending the discharging/charging when the measured voltage reaches the corrected target voltage.
摘要:
The present invention relates to a power system utilizing an engine generator or public power with AC source, wherein the power system particularly has the characteristics that the maximum output current thereof is limited by electromagnetic effects, and/or constant current or nearly constant current output thereof is set to be lower than the maximum output current, for powering a load, and charging a battery, or jointly powering a load with a battery; when an engine generator set is utilized to be power supply, during operation, the engine operates with the best brake specific fuel consumption and/or the range of revolutions and torque for better energy saving.
摘要:
The present invention relates to a power system utilizing an engine generator or public power with AC source, wherein the power system particularly has the characteristics that the maximum output current thereof is limited by electromagnetic effects, and/or constant current or nearly constant current output thereof is set to be lower than the maximum output current, for powering a load, and charging a battery, or jointly powering a load with a battery; when an engine generator set is utilized to be power supply, during operation, the engine operates with the best brake specific fuel consumption and/or the range of revolutions and torque for better energy saving.
摘要:
A state-of-charge equalizing device equalizes the state of charge of each of cells connected in series to form an assembled battery, and comprises charging/discharging circuits connected in parallel to the respective cells to discharge and/or charge the respective cells, voltage measurement circuits connected to the respective charging/discharging circuits to measure the voltages across the respective cells, and a control circuit. The control circuit comprises a unit calculating an equalization target voltage based on the measured voltages before the charge or discharge starts, a unit starting discharging/charging the cells having a voltage thereacross different from the target voltage, a unit correcting the target voltage to thereby calculate a corrected equalization target voltage for each of those cells based on the difference between the measured voltages before and at a certain time period after the charging/discharging, and a unit ending the discharging/charging when the measured voltage reaches the corrected target voltage.
摘要:
A power conversion device has single-phase sub-inverters (2a) to (2c), each connected in series with respective phase of a three-phase main inverter (1) having a smoothing capacitor (6), which is fed from a power supply (11) via a converter (5), as a DC input thereof, and feeds power to a load (12) using the sum of outputs of the inverters (1) and (2a) to (2c). A manipulative quantity is determined so that the DC voltage at each of smoothing capacitors (3a) to (3c) which is an input of each of the single-phase sub-inverters (2a) to (2c) will follow a command value. The manipulative quantity is added to an output voltage command for the three-phase main inverter (1), and is subtracted from an output voltage command for the single-phase sub-inverters (2a) to (2c). Thus, power is shifted from the three-phase main inverter (1) to the smoothing capacitors (3a) to (3c) of the single-phase sub-inverters (2a) to (2c).
摘要:
A method of control and a control circuit for use in connecting all or sub-parts of a battery supply to a battery driven motor includes relays connected between a motor and each sub-part of a battery supply; a timer having a predetermined time period and which changes its output condition at the end of each time period; a motor speed selector for selecting either full motor speed or a portion thereof; and a switch arrangement which interconnects the relays, timer and motor speed selector. The switch arrangement provides for a first sub-part of the battery supply to be connected to the motor when the selector is in a less than full speed position and when the timer has one output condition. A second sub-part of the battery supply is connected to the motor when the selector is in a less than full speed position and the timer has a second output condition. The relays connect the full battery supply to the motor when the selector is in a full speed position.
摘要:
A power conversion device has single-phase sub-inverters (2a) to (2c), each connected in series with respective phase of a three-phase main inverter (1) having a smoothing capacitor (6), which is fed from a power supply (11) via a converter (5), as a DC input thereof, and feeds power to a load (12) using the sum of outputs of the inverters (1) and (2a) to (2c). A manipulative quantity is determined so that the DC voltage at each of smoothing capacitors (3a) to (3c) which is an input of each of the single-phase sub-inverters (2a) to (2c) will follow a command value. The manipulative quantity is added to an output voltage command for the three-phase main inverter (1), and is subtracted from an output voltage command for the single-phase sub-inverters (2a) to (2c). Thus, power is shifted from the three-phase main inverter (1) to the smoothing capacitors (3a) to (3c) of the single-phase sub-inverters (2a) to (2c).
摘要:
A motor drive system for driving a single-phase PSC motor, in which the two motor windings are conductively isolated from each other, from a two phase power source. In one embodiment, the PSC motor is supplied from a two phase inverter circuit. The PSC motor is also connectable through a four-pole double-throw switch to either a single phase source including a run capacitor or the two phase inverter circuit.
摘要:
A power supply for supplying power to a series and/or shunt switched regulator, comprises positive and negative output means, a first and a second voltage source (12,14) and a current source (16) connected in a series between said output means, and by-pass means (18) connected in parallel with said current source (16) and one (12) of said first and second voltage sources and operable so that, when said output means are open circuit,only said one voltage source (12) is applied across said current source (16), but when said output means are shorted both said voltage sources (12,14) are applied across said current source (16).