JPH07231502A - Retarder - Google Patents

Abstract

PURPOSE:To provide a retarder employing an induction motor having double winding structure in which a battery can be charged without requiring an independent charger. CONSTITUTION:The stator of an induction motor comprises first and second windings 2, 3, wherein the second winding 2 is connected through an inverter 4 with a battery 8, and the second winding 3 is connected through an inverter 5 with the battery 8. The induction motor has a rotor coupled with a clutch and the rotor is kept stationary when the clutch is turned ON. When the battery 8 is charged, the inverter 5 is turned OFF and the inverter 4 is turned ON through a controller 7. The flux of the second winding 3 induces a current in the first winding 2 thus feeding the battery 8 with a charging current through the inverter 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retarder device, and more particularly to control of a retarder device mounted on a vehicle such as an automobile during battery charging.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Unexamined Patent Publication No. 4-20790.
No. 0, etc., it has a cage type multi-phase induction motor arranged in series between an engine crankshaft and a transmission, and a battery electrically connected to the stator side of this induction motor via an inverter. , When the engine is braked, the induction motor is used for electric braking, and the induction motor functions as a generator to convert mechanical energy into electric energy to charge the battery and use the electric energy charged during engine start and acceleration. Then, a retarder device has been developed which causes an induction motor to function as an electric motor and is used as a starter and an acceleration assist device. The squirrel cage multi-phase induction motor of such a retarder device must be capable of generating a high torque in order to directly rotate the engine crankshaft during engine start and acceleration, and therefore a high voltage drive induction motor is used. A high voltage is used to match the battery and voltage.

On the other hand, in order to reduce the current capacity per inverter, the windings arranged in the stator of the induction motor are double windings, and the inverters are connected to the respective windings, which is necessary for the entire system. There is also proposed a retarder device using an induction motor having a double winding structure in which each inverter bears the required current capacity.

[0004]

In such a retarder device, as described above, when the engine is started and the engine is accelerated, the crankshaft is directly connected by using the battery, the inverter, and the high voltage side winding in the double winding. The voltage of the battery drops due to rotation, and recharging is required for the next acceleration assist or the like. Recharging is performed by causing the induction motor to function as a generator by so-called regenerative braking during vehicle braking, but in some cases it may not be possible to charge the battery to the maximum allowable voltage. In addition, the engine rest period is long, and the battery voltage may be considerably lower than the maximum allowable voltage at the time of engine start due to natural discharge of the battery. In such a case, conventionally, in order to charge the battery, it is necessary to separately charge from an external power source using a charger, which complicates the charging procedure and increases the cost due to the charger.

The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a retarder device capable of easily charging a battery by an external power source without using a separate charger. Especially.

[0006]

In order to achieve the above object, a retarder device according to a first aspect of the present invention is connected to a mechanical drive system and its stator has a double winding of a first winding and a second winding. A multi-phase induction motor having, and a first connected to the first winding.
In a retarder device that includes an inverter and a battery connected to the first inverter and that causes the polyphase induction motor to function as an electric motor or a generator, an energizing unit that applies an alternating current from an external power source to the second winding. And a stationary means for maintaining the rotor of the multi-phase induction motor in a stationary state during the energization period by the energizing means, and by applying an alternating current to the second winding, the induction is induced in the first winding. It is characterized in that a current is generated and the battery is charged through the first inverter.

In order to achieve the above object, a retarder device according to a second aspect of the present invention is a multi-phase induction device which is connected to a mechanical drive system and whose stator has a double winding of a first winding and a second winding. A motor, a first inverter connected to the first winding, a second inverter connected to the second winding, and a battery connected to the first inverter and the second inverter. In a retarder device that causes a phase induction motor to function as an electric motor or a generator, an energizing unit that energizes an alternating current from an external power source to the second winding, and a rotor of the multiphase induction motor during an energization period of the energizing unit. A stationary means for maintaining a stationary state, and a disconnecting means for interrupting energization between the second inverter and the battery during an energization period by the energizing means, and energizing the second winding with an alternating current. Give rise to more induced current in the first winding, characterized in that charging the battery through the first inverter.

[0008]

As described above, in the retarder device according to the present invention, the double winding structure of the polyphase induction motor is skillfully utilized, and the double winding is used as a transformer, so to speak, separately. It eliminates the need for a charger. That is,
The stator of the polyphase induction motor is provided with a first winding and a second winding, and therefore, when an alternating current from an external power supply is applied to the second winding, an induction current is generated in the first winding. It will be. When the induction current is supplied to the second winding, the stationary means prevents the rotor of the polyphase induction motor from rotating, so that the engine stop state can be maintained and the battery can be efficiently charged. .

In the retarder device according to the second aspect, when the second winding is connected to the battery via the second inverter, the second winding and the battery are energized when the second winding is energized. By shutting off, the alternating current is passed only through the second winding to efficiently charge the battery.

[0010]

Embodiments of the retarder device of the present invention will be described below with reference to the drawings.

FIG. 1 shows the circuit configuration of the retarder device of this embodiment, and FIG. 2 shows the configuration of the polyphase induction motor of this embodiment. A first winding 2 (high-voltage winding) and a second winding 3 are attached to the stator of the induction motor 20, and one end of the induction motor 20 is connected to the engine via an engine crankshaft (not shown). The other end is directly connected to the transmission. The first winding 2 of the induction motor 20 is connected to the DC battery 8 via the inverter 4, and the second winding 3 is connected to the battery 8 via the inverter 5.
It is connected to the. Further, a controller 7 for controlling the inverter 4 and the inverter 5 according to the engine operating state.
The controller 7 is supplied with the current and voltage signals of the battery 8. Further, the rotation sensor 1 for detecting the rotation of the rotor of the induction motor 20 is provided,
The rotation signal of the rotor is supplied to the controller 7. Further, a clutch 9 is connected to the rotor of the induction motor 20, and the clutch 9 is turned on or off by an ON / OFF control signal from the controller 7 to control the rotating state of the rotor. That is, when the clutch 9 is turned on by the control signal from the controller 7, the rotor does not rotate and is kept stationary.

Further, an external power input terminal 6 is provided between the second winding 3 and the inverter 5, and the external power input terminal 6 is connected to an external three-phase (3φ) power source 10 to provide a 3 The phase alternating current is supplied to the second winding 3. The ON / OFF signal of the external power supply 10 is automatically or manually supplied to the controller 7, and the controller 7 supplies the supplied signals, that is, the rotation signal from the rotation sensor 1 and the ON signal from the external power supply 10.
The ON / OFF control of the clutch 9 is performed based on the ON / OFF signal, the battery current, and the battery voltage, and the operations of the inverters 4 and 5 are controlled so that the induction motor 20 functions as an electric motor and a generator, and further an external power supply is used. The battery 10 can be charged by 10.

The operation of the controller 7 will be described in more detail below with reference to the flowchart of FIG. In FIG. 3, first, the controller 7 determines the induction motor 20 based on the rotation signal from the rotation sensor 1 provided in the induction motor 20.
It is determined whether or not the rotor is rotating (S10).
1). When the rotor of the induction motor 20 is stationary, it is next determined whether or not the external power source 10 is turned on based on the ON / OFF signal from the external power source 10 (S1).
02). As described above, this determination is performed by the external power source 10
Alternatively, the operator who starts charging the battery 8 may manually notify the controller 7 that the external power supply 10 is turned on. The rotor of the induction motor 20 is stationary, and
When the external power supply 10 is turned on, it is determined that the charging of the battery 8 is started, and the controller 7 stops the operation of the inverter 5 (S103). The operation stop of the inverter 5 is to prevent the AC current from the external power supply from being supplied to the battery 8 via the inverter 5. After stopping the operation of the inverter 5, the controller 7 then supplies a control signal to the clutch 9 to turn on the clutch 9.
N to prohibit the rotation of the rotor of the induction motor 20 (S
104). The ON operation of the clutch 9 is to prevent the induction motor 20 from functioning as an electric motor due to the magnetic field generated by the second winding 3. After turning on the clutch 9, the controller 7 compares the battery voltage V _B supplied from the battery 8 with the maximum allowable voltage V _BMAX of the battery 8 (S105). When the voltage V _B of the battery 8 is lower than the maximum allowable voltage V _BMAX , it is determined that the battery 8 needs to be charged, the operation of the inverter 4 is turned on (S106), and the current to the battery 8 becomes the set current I _BO . The operation of the inverter 4 is controlled so that Inverter 5
Since the operation of is stopped and only the inverter 4 is operating, the alternating current supplied from the external power source 10 through the external power input terminal 6 is applied only to the second winding 3, and the second winding 3 causes the alternating current to flow. An induced current is generated in the first winding 2 by the generated magnetic flux, the induced current is converted into a direct current by the inverter 4 and supplied to the battery 8, and the battery 8 is charged by the high voltage. As described above, since rotation of the rotor of the induction motor 20 is prohibited while the second winding 3 is energized, the induction motor 20 does not function as an electric motor, and the first winding 2 and the first winding 2 of the induction motor 20 and The two windings 3 will function as a transformer, allowing the DC battery 8 to be charged from the external power supply 10 without the need for a separate charger. When the charging of the battery 8 progresses and the voltage V _B to the battery 8 exceeds the maximum allowable voltage V _BMAX ,
It is determined that the charging of the battery 8 is completed, the controller 7 stops the operation of the inverter 4 (S108), and notifies the completion of charging by a display lamp or the like (not shown) (S10).
9).

As described above, in the present embodiment, the double winding structure of the induction motor 20 is skillfully used, and by using these double windings as the transformer, an external power source is used without using a separate charger. Since the battery 8 can be charged from the above, the battery can be quickly charged even when the battery voltage is lowered at the time of starting the engine. In the present embodiment, the operation of the inverter 5 is stopped to cut off the power supply from the second winding 3 to the battery 8 via the inverter 5. However, a contactor is provided between the inverter 5 and the battery 8 and this contactor is provided. It is also possible to cut off the electrical connection by controlling OFF.

[0015]

As described above, according to the retarder device according to the first and second aspects, the battery can be easily charged from the external power source without using a separate charger.

[Brief description of drawings]

FIG. 1 is a circuit configuration diagram of an embodiment of the present invention.

FIG. 2 is a configuration diagram of an induction motor according to an embodiment of the present invention.

FIG. 3 is a processing flowchart of an embodiment of the present invention.

[Explanation of symbols]

 2 First Winding 3 Second Winding 4 First Inverter 5 Second Inverter 6 External Power Input Terminal 7 Controller 8 Battery 9 Clutch 10 External Power Supply 20 Induction Motor

Claims (2)

[Claims] 1. A multi-phase induction motor connected to a mechanical drive system, the stator of which has a double winding of a first winding and a second winding, and a first inverter connected to the first winding, A battery connected to the first inverter; and a current-carrying means for energizing the second winding with an alternating current from an external power source in a retarder device that causes the polyphase induction motor to function as an electric motor or a generator. Stationary means for maintaining the rotor of the multi-phase induction motor in a stationary state during energization by the energizing means, and applying an alternating current to the second winding to supply an induced current to the first winding. A retarder device, wherein the battery is charged and the battery is charged through the first inverter. 2. A multi-phase induction motor which is connected to a mechanical drive system and whose stator has a double winding of a first winding and a second winding; and a first inverter connected to the first winding. A retarder device comprising: a second inverter connected to the second winding; and a battery connected to the first inverter and a second inverter, the retarder device causing the polyphase induction motor to function as an electric motor or a generator. Energizing means for energizing the second winding with an alternating current from a power source; stationary means for keeping the rotor of the multi-phase induction motor stationary during energizing by the energizing means; Disconnecting means for disconnecting the power supply between the second inverter and the battery, and applying an alternating current to the second winding to generate an induced current in the first winding. Inn Retarder device, characterized in that charging the battery through the chromatography data.