JPS62268326A - Turbo-generator controller - 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 control device for a turbo generator that controls the power generated by a generator provided on the rotating shaft of a turbocharger.

(Prior Art) Conventionally, constant voltage alternators driven by engine output have been used as generators mounted on vehicles, and those with a large shape and high output are used.

In addition, a generator equipped with a rotor having a permanent magnet is provided between the turbine blades of the turbocharger and the compressor blades, which are driven by the exhaust energy of the engine, and by rotating this generator, the exhaust energy is converted into electricity. As a result, a patent application was filed in 1986-233 for a turbo compound engine that would supply electricity to an electric motor installed on the rotating shaft of the engine.
No. 935.

(Problems to be solved by the invention) In the proposal of the above-mentioned turbo compound engine,
It regenerates exhaust energy and uses it as electric energy, and is smaller than a conventional alternator driven by engine output, and is advantageous in terms of energy conservation, but the voltage from the generator is dependent on the rotation of the rotor. As the number of vehicles increases, the voltage fluctuates to a high level, making it complicated and difficult to supply power to meet the demands of the electrical loads mounted on vehicles.

The present invention has been made in view of two points, and its purpose is to supply an amount of fluctuating generated power from a generator installed in a turbocharger so as to be balanced in accordance with the amount of power demanded. The purpose of the present invention is to provide a control device for a turbo generator.

(Means for Solving the Problems) According to the present invention, in a control device for a turbo generator provided in a turbine driven by exhaust energy, means for controlling the output of the turbo generator to a constant voltage. Provided is a control device for a turbo generator that supplies power to a load via means for controlling the voltage to the constant voltage.

(Function) After rectifying the output of the turbo generator, it is controlled to a predetermined voltage using a chopper control method using a semiconductor control element and then supplied to the load, so even if the amount of power demanded changes, balanced power is always supplied. There is an action that can be taken. Furthermore, the off-time of the chopper control described above has the effect that electric power that is not supplied to the load can be used for charging the battery.

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

FIG. 1 is a block diagram showing the configuration of an embodiment of a control device for a turbo generator according to the present invention, and FIG. 2 is a sectional view showing an example of the configuration of the turbo generator.

In FIG. 2, 1 is a turbocharger driven by exhaust energy, 2 is a turbine housing, 3 is a compressor housing, and 4 is a center housing. Bearings 5.5 are provided at both ends of the center housing 4, and a shaft 6 is provided. is pivoted.

A turbine blade 7 and a compressor blade 8 are attached to both ends of the shaft 6, and the turbine housing 2
, and housed inside the compressor housing 3.

The turbine blades 7 are rotated by receiving the energy of the I-air gas that is pumped through the trachea of the engine (not shown), and the shaft 6
The compressor blades 8 are driven through the air intake port 9 to compress the air introduced from the intake port 9 and forcefully send it to the engine.

IO is a rotor using a permanent magnet with a strong residual magnetic force, is attached to the shaft 6 between the turbine blade 7 and the compressor blade 8, and radiates a strong magnetic flux in the radial direction to the shaft 6. It is magnetized like this. In addition,
An outer cylinder 11 made of a predetermined material with high tensile strength is fitted onto the outer circumference of the rotor 1o, and is configured to withstand the centrifugal force of the ultra-high speed rotation of the rotor 10.

Reference numeral 12 denotes a stator core made of a material with excellent magnetic properties as a high-frequency magnetic core.
The stator winding 13 wound around the stator 2 induces an electromotive force to generate alternating current power.

Next, in the block diagram of FIG.
AC power from the generator A is guided to a rectifier B. C is a controller that has, for example, a silicon-controlled rectifying element, and performs chopper control on the high voltage DC sent from rectifier B to control it so that it corresponds to the rated voltage of, for example, 12V or 24V of electrical equipment for vehicles. It is something to do. In chopper control, the on/off time is controlled according to the power demand of the electrical equipment that serves as the load, and during the off time, the power that is not supplied to the load is controlled by an integrator that can detect the amount of power stored in battery F. It is wired to charge battery F via E.

G is a voltage regulator, which has a predetermined voltage of, for example, 12V or 24V as a reference, and is connected to the comparison terminal of the comparator H, and the other comparison terminal of the comparator H is connected to the electrical equipment. supply voltage is given. Then, when the power demand of the electrical equipment becomes larger than the supply of power from the generator A and the supply voltage to the electrical equipment decreases, the detection operation of the comparator H closes the switch J and the electric power is transferred from the battery F to the electrical equipment. is configured to supply power to the Note that K is a power switch for electrical equipment.

L is a constant voltage device that applies to the comparator M, and 71! after rectification of the power generation @A! , has a predetermined voltage that serves as a reference for detecting whether or not the voltage is higher than a predetermined value, and when the voltage from rectifier B is higher than the predetermined value that serves as the reference, the comparator M outputs an output signal to the AND circuit N. It is configured to send out a signal X.

AND circuit N is connected so that in addition to signal X, signal y from integrator E, which is generated when the amount of charge in battery F decreases, is input, and when these signals x and y are input, charging switch P is turned on. It is configured to charge the buffer battery F from the rectifier B via the regulator Q. In addition,
A signal 2 corresponding to the amount of electricity stored in the battery F is sent to the regulator Q from the integrator E, and the regulator Q is configured to control the charging current in accordance with the amount of electricity stored in the battery F.

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

When the turbine blades 7 of the turbocharger 1 are rotationally driven by the energy of the exhaust gas discharged by the engine operation, the compressor blades 8 and the rotor 1 provided on the same axis are driven to rotate.
0 is driven, the compressor blades 8 compress the air taken in from the suction port 9 inside the compressor housing 3,
The air is pumped to the engine as supercharging air.

On the other hand, alternating current power is induced in the stator winding 13 by the rotation of the rotor 10, and is transmitted to the rectifier B, where it becomes direct current and is sent to the controller C.

Since the controller C has a silicon control element, it performs chopper control of the input DC current according to the power demand of the electrical equipment as a load, controls the voltage to a predetermined voltage, and supplies it to the electrical equipment. At this time, if the exhaust energy is strong and the rotor rotates at a high speed, and the generated voltage of the power generation jaA is high, the rectified DC voltage also becomes high, so the chopper control off time becomes long. Conversely, if the exhaust energy is relatively weak and the voltage from generator A is low, the voltage after rectification will rarely exceed the rated voltage of the electrical equipment that is the load, so the chopper control off time will be short. Become. During these off times, the controller C supplies current to the battery F via the integrator E, so when the off time is long, the charging power is large, and when the off time is short, the charging power is small. , battery F is charged. In addition,
When the electrical equipment is infrequently operated and its power demand is low, the off time becomes long, so the power to the battery F becomes large.

Next, when the load current of the electrical equipment is large and the DC power is supplied to the electrical equipment without performing chopper control using controller C, the power is insufficient and the rated voltage of the electrical equipment cannot be reached. As the terminal voltage becomes low, comparator H, which is comparing the voltage of voltage regulator G, detects this drop in terminal voltage and turns on switch J, supplying power from battery F to electrical equipment. It operates to stabilize the voltage transmitted to electrical equipment.

Also, if the exhaust energy is sufficiently large, the output voltage of generator A is sufficiently high, and its rectified voltage is sufficiently high,
A comparator M, which is comparing the voltage of the voltage regulator, detects this increase in the rectified voltage and sends a signal X to an AND circuit N. Then, when the signal y from the integrator E corresponding to the decrease in the amount of charge stored in the battery F is input to the AND circuit N, the AND circuit N turns on the charging switch P and supplies a sufficiently high rectified power to the regulator Q. It operates to supply and charge battery F through the battery. At this time, since the integrator sends a signal 2 to the regulator Q corresponding to the amount of electricity stored in the battery F, when the amount of electricity stored in the battery F is small, the current passing through the regulator Q becomes large, and the amount of electricity stored increases. When battery F is close to its rated capacity, battery F is charged by controlling the passing current to be small.

Although the present invention has been explained using the above embodiment, various modifications can be made within the spirit of the present invention, and these are not excluded from the scope of the present invention.

(Effect of the invention) According to the invention, after rectifying the output from the turbo generator,
Using a chopper control method using semiconductor control elements, power is supplied by controlling the voltage to match the load, regardless of fluctuations in generated power due to the magnitude of exhaust energy from the engine or changes in the amount of power demanded by the load. , the effect of constantly supplying balanced and stable power can be obtained.

Further, according to the present invention, during the off-time when the load is subjected to chopper control, the battery is charged with electric power that is not supplied to the load, so that exhaust energy can be efficiently regenerated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of a control device for a turbo generator according to the present invention, and FIG. 2 is a sectional view showing an example of the configuration of the turbo generator. 1...Turbocharger, 7...Turbine blade, 10
... Rotor, 12... Stator core, 13... Stator winding, A... Generator, B... Rectifier, C... Controller, D... Electrical equipment, F ...Battery, G
... Voltage regulator, H... Comparator, J... Switch,
L... Constant voltage device, M... Comparator, N... AND circuit, P... Charging switch.

Claims (3)

[Claims] (1) In a control device for a turbo generator provided in a turbine driven by exhaust energy, a means for controlling the output of the turbo generator to a constant voltage is provided, and a control device for controlling the output of the turbo generator to a constant voltage is provided. A control device for a turbo generator, which supplies power to a load. (2) The control device for a turbo generator according to claim (1), wherein a chopper control method using a semiconductor control element is used as the means for controlling the voltage to be constant. (3) The control device for a turbo generator as set forth in claim (2), wherein a battery is charged with power during off-time by the chopper control method.