JP2006141144A - Control unit used for engine driving generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide cost reduction by reducing the number of expensive high voltage wirings and the number of water-proof connectors in a control unit used for an engine driving generation device capable of converting an output of a generator driven by an engine to AC output with a commercial frequency and supplying to a load. <P>SOLUTION: A unit case 5 having a structure in which an opening 501a and an opening 502a of a first case 501 and a second case 502 are butted with each other to be connected is provided to make the opening portion of the second case and a wall portion on the opposite side an operational panel portion 503. Structural parts of a power supply portion and structural parts of a control portion are accommodated in the first case 501, and operational panel side parts 7 to 11 including receptacles connected with plugs attached to an electrical code led to the load are accommodated in the second case 502 to be attached at the operational panel portion 503. The operational panel side parts 7 to 11 are connected with the power supply portion and the control portion in the unit case 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a control unit used in an engine-driven power generator that generates AC power having a commercial frequency by using a generator driven by an engine as a power source.

  As shown in Patent Document 1, in an engine-driven vehicle such as an ATV (All Terrain Vehicle, so-called buggy vehicle) that is an engine-driven vehicle whose main purpose is to travel on rough terrain, a tractor, or a recreational vehicle. AC100V and AC200V are powered by a generator driven by an engine mounted on the vehicle when the vehicle is stopped so that an external electric load such as an electric tool or home appliance can be used outdoors. A power supply device that generates commercial AC power such as (50 Hz or 60 Hz) is often mounted.

  The power generator mounted on the engine-driven vehicle includes an AC generator driven by the engine, and a power converter that converts the output of the AC generator into a DC output and then converts it into an AC output at a commercial frequency. Many of them are used.

  In this type of power generator, even if the rotational speed of the generator is changed, an AC output with a constant frequency can be obtained, so that the rotational speed of the generator can be freely changed. When the load is light, the engine speed can be lowered to improve the fuel consumption rate (efficiency). When the load is heavy, the engine speed can be increased to increase the amount of power generation. Therefore, a high output can be obtained without using a very large generator. Further, since the amount of power generation can be controlled by the rotational speed of the engine, a magnet type AC generator that cannot perform field control can be used as a generator that supplies electric power to an external electric load. A magnet type AC generator is widely used as a generator for supplying electric power to various electrical components (such as an engine ignition device, a fuel injection device, an ignition device, and a controller that controls the fuel injection device) provided in the vehicle body. ing. A power generator that supplies AC power of commercial frequency to an external load can be easily configured by providing an armature winding for supplying power to the external load on this magnet type AC generator and combining it with a power converter. can do.

  Although engine-driven power generation devices include portable power generation devices, in a portable engine-driven power generation device, the output of the AC generator driven by the engine is temporarily converted into a DC output, and then converted to a commercial frequency AC output. The same can be said for the conversion configuration.

  FIG. 4 shows a configuration of a conventional power generator in which the output of an AC generator driven by the engine is converted into AC power having a commercial frequency by a power converter. In the figure, reference numeral 1 denotes an engine, and 2 denotes a magnet type AC generator driven by the engine 1. The AC generator 2 has an armature winding 2A composed of three-phase star-connected coils Lu to Lw in addition to an armature winding (not shown) for supplying electric power to vehicle electrical components. Yes.

  The power supply unit 3 includes a converter 3A that converts the AC output of the generator 2 into a DC output, a smoothing capacitor Cd that is connected between the output terminals of the converter 3A, and an inverter 3B that converts the DC output of the converter 3A into an AC voltage. It consists of a power conversion device equipped with. Reference numeral 4 denotes a control unit having an engine control unit 4A and an inverter control unit 4B. The power supply unit 3 and the components of the control unit 4 are accommodated in a box-shaped unit case 5 '.

  Reference numeral 6 denotes an operation panel configured in a box shape, and a plurality of operation panel side parts are attached to the operation panel 6. In the illustrated example, as the operation panel side components, a receptacle 7 for connecting a plug attached to an electric wire connected to a load of the power supply device, a mode change switch 8 for giving a control mode change command to the control unit 4, and an operation are being performed. A light-emitting display 9 such as an LED for displaying such a display or a warning display is attached to the operation panel 6.

  The converter 3A is normally composed of a full-wave rectifier circuit, and its three-phase input terminals pass through a connector 12 having waterproofness and a high-voltage wiring 13 formed by further insulating and covering the three-phase cables 13u to 13w. The generator 2 is connected to the output terminals 2u to 2w. An expensive double insulated cable is used as the high-voltage wiring 13 in order to prevent damage to the electric wire coating due to stepping stones while the vehicle is running or damage to the electric wire insulation coating due to vibrations of the engine and the vehicle body. ing. In this specification, the wiring to which the output voltage of the generator 2 is applied or the wiring to which the output voltage of the power supply unit 3 is applied is like wiring for transmitting an output signal of a sensor, a control signal, an actuator driving current, and the like. It is called “high voltage wiring” in the sense of being distinguished from wiring to which a low voltage is applied.

  The inverter 3B includes an H-bridge type switch circuit 3B1 and a filter 3B2 that extracts an AC voltage of a commercial frequency component from the AC voltage output from the switch circuit 3B1, and the switch circuit 3B1 is controlled by the inverter control unit 4B. As a result, an AC voltage having a commercial frequency (50 Hz or 60 Hz) is output between the output terminals 3u and 3v.

  The engine control unit 4A controls the ignition timing, fuel injection amount, and throttle valve opening of the engine so as to adapt to the requirements in each mode when the engine is operated in the vehicle travel mode and in the power generation mode. It is a part to do.

  The engine control unit 4A is provided with an ignition circuit that controls a primary current of the ignition coil IG so as to induce a high voltage for ignition in the secondary coil of the ignition coil IG when an ignition signal is given, and an injection command signal. The injector drive circuit (not shown) for supplying a drive current to the injector INJ of the fuel injection device and the actuator 15 for operating the throttle valve 1B provided in the intake pipe 1A of the engine In addition to an actuator drive circuit that supplies a hardware circuit, as means configured by causing a microprocessor to execute a predetermined program, an ignition control means for controlling the generation timing of an ignition signal, an injection command signal Injection control hand that controls generation timing and fuel injection time (signal width of injection command signal) , And a variety of control means such as a throttle control means for controlling the current supplied to the opening of the throttle valve 1B the actuator 15 to match the target opening. The output of the gear position sensor 16 that detects the gear position of the power transmission device that transmits the output of the engine 1 to the drive wheels is input to the engine control unit 4A.

  An ignition circuit provided in the engine control unit causes a sudden change in the primary current of the ignition coil IG when an ignition signal is given from the ignition control means, and induces a high voltage in the secondary coil of the ignition coil. The high voltage induced in the secondary coil of the ignition coil is applied through the high voltage cable 14 to the ignition plug PL attached to the cylinder of the engine 1. In addition, when an injection command signal is given from the injection control means, the injection drive circuit causes a fuel current to flow through the injector INJ for a time corresponding to the signal width of the injection command signal.

  The inverter control unit 4B controls the switch circuit 3B1 so as to output an AC voltage having a constant frequency from the switch circuit 3B1 when receiving an instruction from the mode changeover switch 8 to set the control mode to the power generation mode, and the inverter 3B. And means for calculating a target rotational speed of the engine necessary for maintaining the AC voltage applied to the load at a target value. The target rotational speed calculated by the inverter control unit 4B is given to the engine control unit 4A. Each means constituting the inverter control unit 4B is configured by causing a microprocessor to execute a predetermined program.

  The engine control unit 4A detects that the gear position of the power transmission device is in a position (parking position or neutral position) where the transmission of power is cut off by the gear position sensor 16, and the mode switch 8 generates the control mode. When the mode is switched to the mode position, the actuator 15 for operating the throttle valve 1B is controlled so as to keep the engine rotational speed at the target rotational speed.

  The inverter control unit 4B is operated in the power generation mode by applying a driving voltage to the light emitting display 9 to cause the light emitting display to emit light while generating an AC output from the inverter 3B. To display. When the mode changeover switch 8 is in a state of generating a command for setting the control mode to the vehicle travel mode, the inverter 3B is not controlled by the inverter control unit 4B, and the power supply unit 3 stops outputting. At this time, the engine control unit 4A controls the ignition timing and fuel injection time of the engine so as to adapt to the running of the vehicle, and the opening of the throttle valve 1B is set to an opening corresponding to the driver's accelerator operation. The actuator 15 is controlled.

Waterproof connectors 17 and 18 are attached to the unit case 5 'and the operation panel 6, respectively, and one end and the other end of a high voltage wiring (double insulation cable) 19 formed by further covering the cables 19u and 19v with insulation coating. The connectors 17 and 18 are connected to the output terminals 3u and 3v of the inverter 3B and the receptacle 7, respectively.
JP 2004-40876 A

  As described above, in the conventional engine drive power generator, the components of the power supply unit 3 and the control unit 4 are accommodated in the unit case 5 ', and the operation panel side components such as the receptacle 7 and the mode change switch 8 are connected to the unit case. It was attached to the operation panel 6 provided separately from 5 '. Therefore, it is necessary to connect the unit case 5 'and the operation panel 6 through the expensive high-voltage wiring 17 and the waterproof connectors 15 and 16, and the cost is unavoidable. In addition, since the system components are divided into a controller unit configured by housing the components in the unit case 5 'and the operation panel 6, the number of work steps for assembling the power generator increases, and the manufacturing cost of the power generator is reduced. There was also a problem of raising it.

  In general, in an electrical product, the frequency and intensity of the electromagnetic wave radiated from the electrical product are legally regulated so as not to cause electromagnetic interference to surrounding communication devices. The power conversion device constituting the power supply unit 3 switches the combination of switch elements (switch elements at diagonal positions of the H bridge) that are simultaneously turned on in the switch circuit 3B1 of the inverter at a predetermined timing, and through the switch circuit. Since a sine wave AC output having a commercial frequency is generated by PWM control of the flowing current at a high frequency, there is a possibility of generating high-frequency noise included in a reception band of a radio or the like. Therefore, in the case where a structure in which the unit case 5 ′ in which the components of the inverter are accommodated and the operation panel 6 are connected through the high voltage wiring 17 as in the conventional power generator, the high voltage wiring 17 is used. Electromagnetic waves were radiated from this part, and there was a possibility of causing damage to surrounding equipment, which was not preferable.

  An object of the present invention is to reduce the number of expensive high-voltage wiring and waterproof connectors, thereby reducing the cost and controlling the engine-driven power generator that can reduce the number of work steps when assembling the device. To provide a unit.

  Another object of the present invention is to provide a control unit for an engine-driven power generator that eliminates the possibility of causing electromagnetic interference to surrounding equipment.

  The present invention includes a power supply unit that outputs AC power at a commercial frequency using a generator driven by an engine as a power supply, and a control necessary for operating the engine and a control for maintaining the output of the power supply unit at a target value. The present invention relates to a control unit used in an engine-driven power generation apparatus including a control unit to be performed, a receptacle for connecting a plug connected to a load of a power supply unit, and an operation panel side part including switches for giving commands to the control unit. .

  In the present invention, the operation panel unit is integrally provided in the unit case in which the power supply unit component and the control unit component are accommodated, and the operation panel side component is attached to the operation panel unit. The operation panel side parts are connected to the power supply unit and the control unit.

  If comprised as mentioned above, since the high voltage wiring which connects between the output terminal of a power supply part and the receptacle which is one of the operation panel side components will be accommodated in a unit case, the output terminal of a power supply part Therefore, it is possible to eliminate the need to use an expensive cable such as a double insulated cable as a high voltage wiring for connecting the cable and the receptacle. Further, the waterproof connector for connecting the high voltage wiring to the unit can be eliminated. Therefore, the number of expensive high-voltage wirings and the number of waterproof connectors can be reduced, and the cost can be reduced.

  In addition, when configured as described above, when assembling the power generation apparatus, it is only necessary to attach one unit case to a predetermined attachment location, so that it is possible to reduce the manufacturing cost by reducing the number of assembly steps of the apparatus.

  In a preferred aspect of the present invention, the power supply unit is constituted by a power conversion device that converts the output of the generator into AC power having a commercial frequency. Also, a unit case having a structure in which the first case having an opening at one end and the opening of the second case are connected to each other is provided, and the wall on the other end side of the second case is the operation panel unit. The power supply unit components and the control unit components are accommodated in the first case. The operation panel side component is accommodated in the second case and attached to the operation panel unit. The operation panel side parts attached to the operation panel are connected to the power supply unit and the control unit in the unit case. Further, a connector that relays the wiring for connecting between the parts arranged on the engine side and the control unit and between the output terminal of the generator and the power supply unit is attached to a part other than the operation panel unit of the unit case. .

  When configured as described above, in a preferred aspect of the present invention, the parts in the first case having the maximum protrusion length to the operation panel side and the operation panel having the maximum protrusion length to the first case side are provided. The arrangement of the components in the first case and the components attached to the operation panel unit is determined so that the side components are not arranged in a state of facing each other.

  As described above, when the arrangement of the components in the first case and the arrangement of the components attached to the operation panel unit are determined, the wall portion on the other end side of the first case and the other end side of the second case are arranged. Since the distance to the wall can be shortened, the unit can be miniaturized.

  In order to minimize the size of the unit, in order to minimize the empty space formed in the unit case within the range that does not hinder the electrical connection between components, It is preferable to determine the arrangement of the components and the arrangement of the components attached to the operation panel unit.

  In a preferred aspect of the present invention, the required mold parts (parts that need to be molded to ensure a waterproof and vibration-resistant mold) of the components of the power supply unit and the control unit are made of resin cast in the unit case. Molded.

  If comprised in this way, since the waterproofness and vibration resistance of the components which comprise a power supply part and a control part can be improved, the reliability of a unit can be improved.

  In a preferred aspect of the present invention, the unit case is made of a conductive metal.

  In this way, if the unit case is made of metal, the unit case can be used to shield the components inside the unit case, thus preventing electromagnetic waves generated from the power supply unit from being radiated to the outside as noise. Can do.

  As described above, according to the present invention, the operation panel unit is integrally provided in the unit case that accommodates the power supply unit component and the control unit component, and the operation panel side component is attached to the operation panel unit. Since the operation panel side parts are connected to the power supply unit and control unit in the unit case, it is necessary to use an expensive cable such as a double insulated cable as the wiring connecting the output terminal of the power supply unit and the receptacle. Can be eliminated. Therefore, the number of expensive cables and the number of waterproof connectors can be reduced to reduce the cost.

  Further, according to the present invention, when assembling the power generation apparatus, it is only necessary to attach a single unit case to a predetermined mounting location. Therefore, it is possible to reduce the man-hours for mounting the unit and reduce the manufacturing cost of the power generation apparatus. Can be achieved.

  In the present invention, when the unit case is made of metal, the unit case can be used for electromagnetic shielding of components inside the unit case, so that electromagnetic waves generated from the power supply unit are prevented from being radiated to the outside as noise. Can do.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a circuit diagram showing a configuration of an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an engine for driving a vehicle, and an intake pipe 1A of the engine 1 is provided with a throttle valve 1B. Further, an injector INJ is attached to the intake pipe 1A so as to inject fuel into a space between the throttle valve 1B and the intake hole of the engine. An ignition plug PL is attached to the cylinder head of the engine, and the induced voltage of the secondary coil of the ignition coil IG is applied to the ignition plug PL through the high voltage cord 13. A throttle actuator 15 using a motor as a drive source is connected to the operation shaft of the throttle valve 1B, and the opening of the throttle valve 1B can be adjusted by controlling the drive current applied to the throttle actuator.

  Reference numeral 2 denotes a magnet type AC generator driven by the engine 1. The AC generator 2 has an armature winding 2A composed of three-phase star-connected coils Lu to Lw in addition to an armature winding (not shown) that supplies electric power to vehicle electrical components. The output terminals 2u to 2w of the generator 2 are drawn out from the end of the coils Lu to Lw on the non-neutral point side.

  Reference numeral 3 denotes a power supply unit. This power supply unit converts the AC output of the generator 2 into a DC output, the smoothing capacitor Cd connected between the output terminals of the converter 3A, and the DC output of the converter 3A. The power converter includes an inverter 3B that converts voltage.

  The converter 3A is made up of, for example, a diode bridge full-wave rectifier circuit. Insulation cable 13 and the three-phase output terminals 2u to 2w of the generator 2 are connected.

  The inverter 3B includes an H-bridge type switch circuit 3B1 that is controlled to convert the DC output provided from the converter 3A into an AC output having a constant frequency, and an AC voltage that is a commercial frequency component from the AC voltage output from the switch circuit 3B1. It consists of a filter 3B2 for extracting the voltage. The filter 3B2 is formed of a low-pass filter circuit including coils L1 and L2 and capacitors C1 and C2.

  Reference numeral 4 denotes a control unit, and the illustrated control unit includes an engine control unit 4A and an inverter control unit 4B. The engine control unit 4A has an ignition circuit (not shown) that controls a primary current of the ignition coil in order to induce a high voltage for ignition in the secondary coil of the ignition coil IG when an ignition signal is given. An injector drive circuit (not shown) for supplying a drive current to the injector INJ when an injection command signal is given, and a drive for the actuator 7 when controlling the opening of the throttle valve 1B to a predetermined opening A hardware circuit including an actuator driving circuit for supplying an electric current, an ignition control means for controlling the generation timing of the ignition signal, an injection command signal generation timing, and an injection for controlling the fuel injection time (signal width of the injection command signal) Various control means including a control means and a throttle control means for controlling the actuator 7 for operating the throttle valve 1B. .

  The ignition circuit provided in the engine control unit 4A is connected to the primary coil of the ignition coil IG through the connector 20 and the lead wire 21. The injector drive circuit in the engine control unit 4A is connected to the injector INJ through the connector 20 and the lead wire 22, and the actuator drive circuit is connected to the actuator 15 through the connector 20 and the lead wire 23. Further, the output of the gear position sensor 16 that detects the gear position of the power transmission device that transmits the output of the engine 1 to the drive wheels is input to the engine control unit 4A through the lead wire 24 and the connector 20.

  The connector 20 is a multipolar connector having waterproof properties, and includes a receptacle 20A attached to the unit case 5 and a plug 20B connected to the receptacle in a detachable state.

  Each contact provided in the receptacle 20A is connected to a predetermined connection location of a circuit in the unit case through wiring arranged in the unit case 5. The lead wires 21 to 24 are collectively covered with an insulating tube so as to constitute a wire harness, and are connected to predetermined contacts of the plug 20B. Further, the three-phase cables 13u to 13w constituting the high voltage wiring 13 are connected to the corresponding contacts of the plug 20B.

  7 to 9 are parts on the operation panel side, 7 is a receptacle to which a plug attached to a cord connected to a load is connected, and 8 is in a state different between when the control mode is set to the power generation mode and when the vehicle travel mode is set ( A mode changeover switch 9 is operated so as to be in an on state or an off state), and 9 is a light emitting display comprising LEDs and the like.

  The inverter control unit 4B turns on and off the switch elements constituting the switch circuit 3B1 so that the switch circuit 3B1 outputs an AC voltage having a constant frequency when receiving an instruction from the mode changeover switch 8 to set the control mode to the power generation mode. Switch circuit control means for controlling, and target rotation speed calculation means for calculating the target rotation speed of the engine necessary for maintaining the AC voltage applied to the load from the inverter 3B at the target value are provided.

  The switch circuit control means outputs an alternating voltage of a constant frequency (commercial frequency) through the switch circuit 3B1 as a pair of switch elements that simultaneously turn on the two switch elements at the diagonal positions of the H-bridge type switch circuit 3B1. The combination of the pair of switch elements to be simultaneously turned on is switched at a predetermined cycle, and the instantaneous value of the alternating voltage output through the switch circuit 3B1 is turned on so as to match the instantaneous value of the sine waveform. A sinusoidal AC voltage is output from the filter 3B2 by PWM-controlling at least one of the pair of switch elements in a given period at a high frequency.

  The target rotational speed calculation means detects the output voltage of the converter 3A or the output voltage of the inverter 3B, and uses the engine rotational speed necessary to make the deviation between the detected voltage and the target output voltage zero as the target rotational speed. Calculate. This target rotation speed is given to the engine control unit 4A.

  Each control unit of the engine control unit 4A and each control unit constituting the inverter control unit 4B may be configured by causing a microprocessor provided in common to both control units to execute a predetermined program. Alternatively, a predetermined program may be executed by a microprocessor provided separately.

  The engine control unit 4A may be in a position (parking position or neutral position) where the gear position of the power transmission device provided between the crankshaft of the engine and the drive wheels is cut off from the power transmission by the gear position sensor 16. When it is detected and the mode changeover switch 8 is switched to the position where the control mode is set to the power generation mode, it is necessary to maintain the engine speed and the output voltage of the power source at the target voltage (rated voltage). The actuator 15 that operates the throttle valve 1B is controlled so as to match the target rotational speed.

  The engine control unit 4A also has an amount corresponding to the amount of displacement of the accelerator operating member (pedal or grip) operated by the driver when the mode switch 8 is switched to the position where the control mode is the vehicle travel mode. The actuator 15 is controlled to displace the throttle valve 1B.

  The inverter control unit 4B is operated in the power generation mode by applying a driving voltage to the light emitting display 9 to cause the light emitting display to emit light while generating an AC output from the inverter 3B. To display. When the mode changeover switch 8 is in a state of generating a command for setting the control mode to the vehicle running mode, the control of the inverter 3B by the inverter control unit 4B is stopped, and the output of the commercial AC power from the power supply unit 3B is stopped. It is done.

  In the present invention, the component parts of the power supply unit 3 and the component parts of the control unit 4 are accommodated in one unit case 5. Further, an operation panel unit is integrally provided in the unit case 5, and operation panel side components 7, 8, 9 and the like are attached to the operation panel unit, and these operation panel side components are connected to the power source unit 3 and the control unit in the unit case. Connected to the unit 4. A control unit CU that controls the engine 1 and the power supply unit 3 is configured by the unit case 5 and the components housed therein.

  2A, 2B, and 3, an example of the mechanical configuration of the control unit CU according to the present invention is shown. As shown in FIG. 2B, the unit case 5 includes a box-shaped first case 501 having an opening at one end and a box-shaped second case 502 having an opening at one end. It has a structure in which the openings are connected to each other, and the wall portion on the other end side (the side opposite to the opening) of the second case 502 is an operation panel portion 503. Each of the first case 501 and the second case 502 is made of a conductive metal such as aluminum.

  The first case 501 has a rectangular parallelepiped case main portion 501A having an opening 501a (see FIG. 3) at one end and a rectangular window portion 501A2 formed on the bottom portion 501A1 of the case main portion. And a bottomed case extension 501B provided in a protruding state. As shown in FIG. 3, the case extension 501B is provided at a position biased toward one end in the width direction of the bottom portion 501A1 of the case main portion 501A, and near the other end in the width direction of the bottom portion 501A1 of the case main portion 501A. A plurality of heat radiating fins 30 of the heat sink are disposed in almost half. The heat radiating fins 30 are provided integrally with a heat sink (not shown) housed in the case main portion 501A, and are cast into the bottom portion 501A1 of the case main portion 501A and The bottom part 501A1 is protruded outside through the bottom part 501A1.

  Coils L1 and L2 of the filter 3B2 wound around the iron core 35 are accommodated in the case extension 501B of the first case 501. Further, in the case main part 501A, capacitors C1 and C2 of the filter 3B2, an IC constituting the converter 3A of the power supply part 3, a switch element (eg, MOSFET) constituting the H bridge type switch circuit 3B1, and a smoothing capacitor A circuit board 36 (see FIG. 2B) to which Cd is attached is accommodated, and the heat dissipation portion of the switch element constituting the switch circuit 3B1 is thermally coupled to the heat sink provided with the heat dissipation fins 30.

  In the case main part 501A of the first case 501, a circuit board 40 (see FIG. 2B) to which components such as a microprocessor constituting the control unit 4 are attached is positioned above the circuit board 36. Is housed in.

  An insulating thermosetting resin 41 is cast in the first case 501, and this resin molds the main parts of the power supply unit 3 and the control unit 4 (water resistance and vibration resistance to the component parts). The portion that needs to be molded in order to have In order to provide waterproofness and vibration resistance to the components in the case, the entire components may be molded with resin, but depending on the exterior of the components, only a part of them may be molded with resin 41. Good. In order to give vibration resistance to the components in the case, it is preferable to mold at least a part of each component with resin. In the illustrated example, most of the electronic components attached to the circuit board 36 are molded with the resin 41. However, in the case of tall parts such as capacitors C1, C2, only the vicinity of the base close to the circuit board 36 side is the resin 41. It is molded by.

  Arrangement of components housed in the first case and arrangement of operation panel side components attached to the operation panel unit 503 are arbitrary, but in order to configure the unit case in a small size, it protrudes to the operation panel unit 503 side. The parts in the first case having the maximum length and the operation panel side parts having the maximum projecting length toward the first case 501 are not arranged in a state of facing each other in the unit case. In addition, the arrangement of the components in the first case 501 and the components attached to the operation panel unit 503 is determined. In the example shown in the drawing, the first case side components having the maximum protrusion length toward the operation panel 503 are capacitors C1 and C2, and the operation panel portion side having the maximum protrusion length toward the first case 501 is shown. The part is a breaker 11. The arrangement of the parts in the first case and the arrangement of the parts in the second case are determined so that these parts do not face each other in the unit case. In order to make the unit case small, it is preferable to arrange the parts in the first case and the parts in the second case so as not to oppose each other as much as possible. It is preferable that the component and the component having a short height face each other.

  The receptacle 20 </ b> A of the connector 20 is provided at a portion other than the operation panel portion of the unit case 5. In the illustrated example, the receptacle 20 </ b> A is provided on the side wall portion of the first case 501.

  The second case 502 is a box-shaped case having an opening 502a (see FIG. 3) at one end, and a wall portion on the other end side (a wall portion opposite to the opening portion 502a) serves as an operation panel portion 503. Yes. Operation panel side parts are accommodated in the second case 502. In the example shown in FIGS. 2 and 3, a receptacle 7 to which a plug (not shown) attached to an end portion of an electric cord connected to an external electric load is connected as an operation panel side component, and a mode change switch 8. And a light emitting display 9 made of LEDs and the like, a power switch 10, and a breaker (earth leakage breaker) 11. The types of the mode switch 8 and the power switch 10 are arbitrary, but in the illustrated example, these switches are all rocker switches. The operation panel side parts are fixed to the operation panel unit 503 by screws or the like in a state where each exposure required part is exposed to the outside through a hole provided in the operation panel unit 503.

  The exposed portion of the operation panel side part is a portion that needs to be exposed outside the unit case, and the exposed portion of the receptacle 7 is the end of the receptacle shell in which the holes 7a and 7b into which the plug contacts are inserted are formed. Part. Further, the required exposure portions of the mode switch 8 and the power switch 10 are portions where rockers 8a and 10a for operating the switches are provided.

  The required exposure portion of the light emitting display 9 is a light emitting portion 9a that emits light to the outside, and the required exposure portion of the breaker 11 is a knob 11a that is operated by hand when the breaker is returned.

  The operation panel side component is connected to a predetermined component in the first case in the unit case. In the illustrated example, the terminals 701 and 702 of the receptacle 7 are connected to the output terminals 3u and 3v of the filter through lead wires 45 and 46, respectively. The mode changeover switch 8 is connected to the circuit board 40 to which the components of the control unit are attached through lead wires 47 and 48, and the light emitting display 9 is connected to the circuit board 40 through lead wires 51 and 52. The power switch 10 is composed of a three-pole switch, and is inserted between the three-phase input terminal of the converter 3A and the connector 20, and the breaker 11 is inserted between the output terminal of the filter 3B2 and the receptacle 7. . In FIG. 1, the power switch 10 and the breaker 11 are not shown.

  After housing the parts in the first case 501, attaching the operation panel side parts to the second case 502 and performing wiring between the operation panel side parts and the parts in the first case 501, The unit case 5 is assembled by abutting the opening 502a of the second case with the opening 501a of the first case 501 and joining the abutting part J (see FIG. 2B) with an adhesive, thereby integrating both cases. .

  As described above, the operation panel unit is integrally provided in the unit case 5 that accommodates the components of the power supply unit 3 and the components of the control unit 4, and the operation panel side components are attached to the operation panel unit 503. When the operation panel side component is connected to the power supply unit and the control unit, the high voltage wiring connecting the output terminal of the power supply unit and the receptacle which is one of the operation panel side components is accommodated in the unit case. Therefore, it is not necessary to use an expensive double insulated cable as a high voltage wiring for connecting between the output terminal of the power supply unit 3 and the receptacle 7. Further, since the waterproof connector for connecting the high voltage wiring to the unit can be eliminated, the number of expensive high voltage wirings and the number of waterproof connectors can be reduced to reduce the cost.

  In addition, when configured as described above, when the unit is assembled to the vehicle, it is only necessary to attach one unit case 5 to a predetermined mounting location. Therefore, the number of steps for assembling the vehicle can be reduced and the manufacturing cost of the vehicle can be reduced. Can do.

  Further, as in the above embodiment, the unit case 5 is made of metal, and a power supply unit that generates electromagnetic noise and a high-voltage wiring that connects between the output terminal of the power supply unit and the receptacle are provided in the unit case. If it accommodates, since the part which radiates | emits electromagnetic noise can be shielded with a unit case, it can prevent that the electromagnetic wave generated from the power supply part is radiated | emitted outside as noise.

  In the above embodiment, the first case 501 constituting the unit case 5 has a structure including the case main portion 501A and the case expansion portion 501B protruding from the bottom of the case main portion 501A. The structure is not limited to that of the above-described embodiment, and for example, the entire first case 501 can have a simple rectangular parallelepiped shape.

  In the above embodiment, the case where the present invention is applied to an engine-driven power generator mounted on a vehicle is taken as an example. However, the present invention can also be applied to a portable (portable) engine-driven power generator. Of course you can.

It is a circuit diagram showing an electrical configuration of an embodiment of the present invention. (A) is the top view which showed the mechanical structure of embodiment of this invention, (B) is the BB sectional drawing of (A). It is the disassembled perspective view which showed the mechanical structure of embodiment of this invention. It is the circuit diagram which showed the structure of the conventional power generator for engine drive vehicles.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engine 2 Magnet type AC generator 3 Power supply part 3A Converter 3B Inverter 4 Control part 4A Engine control part 4B Inverter control part 5 Unit case 501 1st case 502 2nd case

Claims (5)

A power source that outputs AC power at a commercial frequency using a generator driven by the engine as a power source, and a control that performs control necessary for operating the engine and control for maintaining the output of the power source at a target value A control unit for use in an engine-driven power generation apparatus including an operation panel side part including a switch and a receptacle for connecting a plug connected to a load connected to a load of the power supply unit and a command to the control unit,
An operation panel unit is integrally provided in a unit case in which the power supply unit component and the control unit component are accommodated, and the operation panel side component is attached to the operation panel unit,
The operation panel side component is connected to the power supply unit and the control unit in the unit case,
The control unit used for the engine drive power generator characterized by this. A generator driven by an engine, a power supply unit having a power conversion device that converts the output of the generator into AC power of commercial frequency, control necessary for operating the engine, and output of the power supply unit Engine-driven power generation comprising: a control unit that performs control for maintaining a value; a receptacle for connecting a plug connected to a load of the power supply unit; and an operation panel side component that includes switches for giving commands to the control unit A control unit used in the apparatus,
A first case having an opening at one end and a unit case having a structure in which the openings of the second case are brought into contact with each other are provided, and the wall on the other end of the second case is an operation panel unit And
The power supply unit component and the control unit component are housed in the first case,
The operation panel side component is accommodated in the second case and attached to the operation panel unit,
The operation panel side component is connected to the power supply unit and the control unit in the unit case,
A connector that relays wiring for connecting between the parts arranged on the engine side and the control unit and between the output terminal of the generator and the power supply unit, other than the operation panel unit of the unit case Attached to the part of the
The control unit used for the engine drive power generator characterized by this.   The component in the first case having the maximum protrusion length toward the operation panel and the operation panel side component having the maximum protrusion length toward the first case are disposed in opposition to each other. The control unit according to claim 2, wherein a part in the first case and a part attached to the operation panel unit are arranged so as not to occur. The molding required parts of the power supply unit and the control unit are molded by a resin cast in the unit case,
The control unit according to claim 1, 2, or 3. The control unit according to claim 1, wherein the unit case is made of metal.

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