JPH0491322A - Power supply device for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a vehicle power supply device that uses a power supply mechanism for a rotating electrical machine attached to a turbocharger to provide a power source for a commercially powered electric product.

(Prior Art) Currently, a battery is installed as a power source in a vehicle, and 12V or 24V DC power from the battery is supplied to electrical equipment mounted on the vehicle.

Therefore, in order to use a home appliance that uses a commercial power source on a vehicle, it is necessary to convert the DC power from the battery into 100 cm AC, and various inverters are used for this purpose.

By the way, as a proposal for installing an inverter in a vehicle, the present applicant proposed a method in which electric power from a battery or the like is boosted and supplied by an inverter to a rotating electric machine placed in a turbocharger, thereby increasing the supercharging pressure to the engine. For example, Japanese Patent Application Laid-Open No. 1-262324
Proposals such as those shown in the publication have been made.

(Problems to be Solved by the Invention) As mentioned above, various commercially available home appliances use AC power, so there is a problem in that they require an inverter when used in a vehicle.

In addition, the inverter for the rotating electric machine installed in the turbocharger as shown in the above-mentioned publication has a very high frequency because the rotating electric machine rotates at an ultra-high speed, and the AC output from the inverter is similar to that of the commercial power supply. Not suitable for powering home appliances.

The present invention was made in view of such problems,
The purpose is to provide a vehicle power supply device that can be used in household electrical appliances by utilizing a power supply device for a rotating electrical machine attached to a turbocharger.

(Means for Solving the Problems) In order to achieve the above-mentioned object, according to the present invention, power from a battery is boosted by a converter, and the boosted power is converted to AC power by an inverter to power a turbocharger. Provided is a vehicle power supply device that supplies power to a rotating electrical machine provided on a rotating shaft to energize supercharging operation, and includes a power control means that outputs alternating current corresponding to a commercial power source by controlling the inverter. be done.

(Function) In the present invention, an inverter for driving a rotating electrical machine provided on the rotating shaft of a turbocharger is used, and the switching frequency is set to 50Hz or 60Hz for operation, so the output can be used to power electrical appliances connected to commercial power sources. Can be used.

Furthermore, when an inverter is used to drive the rotating electric machine, a separate inverter attached thereto is operated for commercial power.

(Example) Next, an example of the present invention will be described in detail using the drawings.

The drawing is a system diagram showing an example of the configuration of a vehicle power supply device according to the present invention.

In the figure, reference numeral 1 denotes a turbocharger, which is equipped with a turbine 11 driven by the exhaust energy of the engine (not shown) and a compressor 12 driven by the turbine torque, and pumps supercharged air to the engine. , a rotating electric machine 13 serving as an electric motor-generator is mounted on its rotating shaft.
is installed, and by supplying electric power to the rotating electric machine 13 to make it run, the supercharging operation of the compressor 12 is activated, and the boost pressure increases to increase the engine output at low rotation and high load. It is composed of

2 is a battery, which serves as a power source for the rotating electric machine 13 and on-vehicle electrical products, etc.; 3 is a voltage converter consisting of a converter circuit 31, a step-up transformer 32, a rectifier circuit 33, 34, etc.; or 24V for example 10
This boosts the voltage to 0V.

The converter circuit 31 includes, for example, a pair of power F
E T Q 81. Qs□ is used, and by sending a pulse current to the primary coil P of the step-up transformer 32, a stepped-up pulsating current is output to the secondary coils S1 and S2, and is rectified by the rectifier circuits 33 and 34.
It is configured to obtain 0V DC power.

4 is the main inverter circuit, for example, 3 pairs of power F E
T, Q41Q4□, Q 42 Q 44, and Q
4 gQ 46. When the rotating electric machine 13 is electrically driven, the DC power that has passed through the rectifier circuit 33 is converted into three-phase pulsating current power with a predetermined high frequency in response to a command signal from the controller, which will be described later.
It is used to supply and run the fuel.

On the other hand, when using a commercially powered electrical product connected to the outlet 9, the power FET Q48Q441Q46 of the main inverter circuit 4 is
It performs switching of Q46, converts it into commercial frequency AC power, and supplies it to the outlet 9.

In addition, 5 is the A switching circuit and 6 is the B switching circuit, each with 2
A device that connects/disconnects a circuit, for example, uses a semiconductor element that can be freely controlled on/off, or a relay circuit.
The switching is controlled by the controller 8, and when driving the rotating electric machine 13, the A switching circuit 5 is turned on and the B switching circuit 6 is turned off, and when power is supplied to the outlet 9,
The A switching circuit 5 is turned off and the B switching circuit 6 is controlled according to a patent.

7 is a sub-inverter circuit, for example, two pairs of power F E
T, QtlQtg, and QyaQy4, and directs the DC output from the rectifier circuit 34 of the voltage converter 3 to the controller 8.
It converts the signal from the AC power source into commercial frequency AC power. When the above-mentioned main inverter circuit 4 operates at a commercial frequency with an electrical appliance as a load, if the output capacity is insufficient, the sub-inverter circuit 7 is operated to supply power of the same frequency and in phase to the load. It is configured.

The controller 8 is composed of a microcomputer, and includes a central control unit for performing arithmetic processing, various memories for storing arithmetic processing procedures, control procedures, etc., input/output circuits, and the like. When signals from the control switch 81 operated by the driver, the rotation sensor 14 of the turbocharger 1, etc. are input, the converter circuit 31, main inverter circuit 4, A switching circuit 5, and B switching circuit are activated based on these signals. 6 and the sub-inverter circuit 7, respectively, to instruct them to perform a switching operation at a predetermined frequency or an off/on operation of the circuit.

Next, the operation of this embodiment configured as described above will be explained.

First, when increasing the boost pressure depending on the operating state of the engine, the A switching circuit 5 is turned on and the B switching circuit 6 is turned off. Then, a predetermined pulse signal is sent to the converter circuit 31 of the voltage converter 3, and the main inverter circuit 4 receives a frequency that causes the rotating electric machine 13 to move based on the signal from the rotation sensor 14 of the turbocharger 1. A switching pulse is input to each of the three pairs of power FETs.

Therefore, the power from the rectifier circuit 33 boosted by the operation of the voltage converter 3 is transferred to the puff-F of the main inverter circuit 4.
When the ET operates, AC power at a predetermined high frequency is supplied to the rotating electric machine 13 via the A switching circuit 5, and its driving activates the pneumatic operation of the converter 12 to increase the boost pressure to the engine. It turns out.

Next, when the inverter for the rotating electric machine is not required even when stopped or when driving, the A switching circuit 5 is turned off, the B switching circuit d is turned on, and the circuit of the voltage converter 3 is activated. A frequency switching signal is sent to the main inverter circuit 4 to operate it.

Therefore, the 100 cm DC output from the rectifier circuit 33 is turned into pulsating power at a commercial frequency by the switching element of the main inverter circuit 4, and is supplied to the commercial power appliance connected to the outlet 9. In this case, if the capacity of the electrical product is large and there is a risk of overloading the main inverter circuit 4, a signal in phase with the switching signal to the main inverter circuit 4 is also sent to the sub-inverter circuit 7. Circuit 7 is activated to provide pulsatile output to outlet 9.

Furthermore, when the vehicle is running and the main inverter circuit 4 is used to drive the rotating electric machine 13, the B switching circuit 6 is turned off and a commercial frequency switching signal is sent to the sub-inverter circuit 7. Power FET Q
7+Q? By the switching operation of □ and QyaQt+, electricity can be supplied to the electric appliance connected to the outlet 9.

Although the present invention has been described above with reference to the above embodiments, various modifications can be made within the scope of the gist of the present invention, and these modifications are not excluded from the scope of the present invention.

(Effects of the Invention) As explained in the above embodiments, according to the present invention, an inverter for driving a rotating electric machine attached to a turbocharger is used to perform switching at a commercial frequency and supply it to an outlet. , the effect is that ordinary commercially available electrical products can be used on the vehicle.

In addition, since a sub-inverter is provided separately from the main inverter mentioned above, if the capacity of the electrical appliance is large, overloading the main inverter can be prevented by operating the sub-inverter at the same time. If the auxiliary inverter is operated as a commercial power source while the vehicle is in operation, AC electric appliances can be used even while the vehicle is running.

[Brief explanation of the drawing]

The drawing is a system diagram showing the configuration of an embodiment of the present invention. 1...turbocharger, 2...battery, 4...
・Main inverter circuit, 7... Sub-inverter circuit, 8.
... Controller, 11... Turbine, 12... Compressor, 13... Rotating electric machine. Patent applicant Isuf Automobile Co., Ltd.

Claims (2)

[Claims] (1) For vehicles that boost power from a battery using a converter, convert the boosted power into AC power using an inverter, and supply it to a rotating electrical machine installed on the rotating shaft of a turbocharger to energize supercharging operation. A power supply device for a vehicle, characterized in that the power supply device comprises a power control means for outputting alternating current corresponding to a commercial power source by controlling the inverter. (2) The power control means also controls a separate inverter attached to the inverter to output alternating current corresponding to the commercial power source, and controls the phase of the alternating current power to be in the same phase as the alternating current from the inverter. A claim characterized in (
1) The vehicle power supply device described above.