JP5225221B2 - Power converter - Google Patents

Description

  The present invention relates to a power conversion device that generates and outputs drive power for an electric load using power supplied from a power supply via a power cable.

  Conventionally, for example, in a hybrid vehicle or the like, an upper cover formed integrally with a connector cover that connects a motor and a drive unit thereof with a cable and covers a connection portion between a connection terminal of the drive unit and a cable connector is connected to the drive unit. The structure attached to the upper surface of the housing | casing is known (for example, refer patent document 1).

  Further, Patent Document 1 is provided with an interlock switch that switches the level (Hi / Lo) of a signal to be output depending on whether or not the upper cover is attached, and detects that the upper cover has been removed by the interlock switch. A configuration is described in which power supply from the battery to the drive unit is stopped.

  According to this configuration, when a vehicle mechanic or the like removes the upper cover and performs work, it is possible to prevent the vehicle from accidentally touching a high voltage circuit (such as an inverter) in the drive unit.

JP-A-2005-143200

  In a hybrid vehicle or the like, for example, the drive unit and the power supply unit may be installed at a location separated from each other as in the case where the motor drive unit is arranged in the front part and the power supply unit is arranged in the rear part. In this case, power is supplied from the power supply unit to the drive unit via the power cable connecting the drive unit and the power supply unit.

  In this way, if maintenance personnel remove the power cable from the power supply unit while power is being supplied from the power supply unit to the drive unit via the power cable, the maintenance personnel etc. There is a risk of touching the connection terminals that output voltage. In addition, if power is being supplied from the power supply unit to the drive unit via the power cable, if a maintenance person removes the power cable from the drive unit, the maintenance person etc. There is a risk of touching the connection.

  For this reason, the power output from the power supply unit may be stopped both when the mechanics remove the power cable from the power supply unit and when the mechanics remove the power cable from the drive unit. desirable.

  Therefore, an interlock switch that detects the disconnection of the power cable is installed at the connection point between the power supply unit and the power cable and at the connection point between the drive unit and the power cable, and it is detected that the power cable has been disconnected at any point. It is conceivable that the power supply from the power supply unit is stopped when the power is supplied.

However, to achieve this configuration, and cost due to the provision of the interlock switch in two places, it is accompanied disadvantages such as increased installation space.

  Therefore, the present invention provides an electric load driving device having a configuration in which the power supply from the power supply unit is stopped when the power cable is disconnected from the power supply unit or the drive unit, with low cost and space saving. The purpose is to do.

The present invention has been made to achieve the above object, and a first aspect of the present invention provides a drive power supply input terminal, a switch signal output terminal, and a predetermined switch drive signal at the switch signal output terminal. A drive unit comprising: a switch drive circuit for outputting; an electric load drive circuit that operates by power input from the drive power input terminal and supplies drive power to a predetermined electrical load; and a drive power output terminal A switch signal input terminal; a drive power supply that outputs predetermined power; a switch circuit that switches between an output portion of the drive power supply and the drive power output terminal; and a switch signal input terminal wherein when the switch drive signal is input to the inter-output portion of the power supply the drive and the drive power supply output terminal and the conductive state by the switch circuit, the switch signal input terminal A power supply unit comprising: a switch control circuit that shuts off the drive power supply output terminal and the drive power supply output terminal by the switch circuit when the switch drive signal is not input; and the drive power supply A drive power cable connecting the input terminal and the drive power output terminal, a signal cable connecting the switch signal input terminal and the switch signal output terminal, the drive power output terminal, and the drive power cable The connection portion with the switch signal input terminal of the signal cable is made unremovable from the power supply unit, and the power supply unit is removed by removing the signal cable from the switch signal input terminal. And a power supply unit cover that can be detached from the power supply unit.

According to the present invention, in the power supply unit, the connection portion between the drive power supply output terminal and the drive power supply cable is covered with the power supply unit cover, and the power supply unit cover is connected with the switch signal output terminal of the signal cable. It cannot be removed from the power supply unit. For this reason, when removing the drive power cable from the power supply unit, an apparatus inspection worker or the like must first remove the signal cable from the power supply unit and then remove the power supply unit cover. When the signal cable is disconnected from the power supply unit, input of the switch drive signal to the switch signal input terminal stops, so the switch control circuit shuts off the drive power supply output section and the drive power supply output terminal. It is said.

  Therefore, when the operator removes the power supply unit cover and removes the drive power cable from the power supply unit, the power output from the drive power output terminal of the power supply unit is stopped. In the present invention, the power supply unit cover can be removed without removing the signal cable from the power supply unit without using a complicated configuration such as providing an interlock switch for detecting that the drive power supply cable has been disconnected. With a simple configuration incapable of being performed, low cost and space saving can be achieved, and when the power cable is disconnected from the power supply unit, the power supply from the power supply unit can be stopped.

Further, in the first aspect, the connecting portion between the driving power input terminal and the driving power cable is covered, and the signal cable is removed from the driving unit by the connecting portion with the switch signal output terminal. A drive unit cover is provided that is disabled and can be detached from the drive unit by removing the signal cable from the switch signal output terminal.

According to the present invention, in the drive unit, the connection portion between the drive power input terminal and the drive power cable is covered with the drive unit cover, and the drive unit cover is connected to the switch signal output terminal of the signal cable. It cannot be removed from the drive unit. For this reason, when removing the drive power cable from the drive unit, it is necessary for an inspection operator of the apparatus to first remove the signal cable from the drive unit and then remove the drive unit cover. When the signal cable is disconnected from the drive unit, the input of the switch drive signal to the switch signal input terminal of the power supply unit is stopped, so that the switch control circuit connects the drive power supply output section and the drive power supply output terminal. Is cut off.

  Therefore, when the operator removes the drive unit cover and removes the drive power cable from the drive unit, the power output from the drive power output terminal of the power supply unit is stopped to drive the drive power cable. It can be set as the state which the electric power output to the connection part with a power input terminal stopped.

Next, a second aspect of the present invention includes a drive power input terminal, a switch signal output terminal, a switch drive circuit that outputs a predetermined switch drive signal to the switch signal output terminal, and the drive power input terminal. A drive unit having an electric load drive circuit that operates by the power input from and supplies drive power to a predetermined electric load, a drive power output terminal, a switch signal input terminal, and outputs predetermined power When the switch drive signal is input to the drive power supply, a switch circuit that switches between the drive power supply output terminal and the drive power supply output terminal between the conduction state and the cutoff state, and the switch signal input terminal, between the output of the power for the drive and the drive power supply output terminal in a conductive state by the switch circuit, when the switch drive signal to the switch signal input terminal is not input A power supply unit comprising: a switch control circuit that shuts off the output of the drive power supply and the drive power supply output terminal by the switch circuit; the drive power supply input terminal; and the drive power supply output terminal; A power cable for driving connected, a signal cable connecting the switch signal input terminal and the switch signal output terminal, and a connection portion between the power input terminal for driving and the power cable for driving, and the signal is impossible removal from the drive unit by the connecting portion between the switching signal output terminal of the cable, said by removing the signal cables from the switch signal output terminal, the drive unit cover removal is possible from the drive unit It is characterized by comprising.

According to the present invention, in the drive unit, the connection portion between the drive power input terminal and the drive power cable is covered with the drive unit cover, and the drive unit cover is connected to the switch signal output terminal of the signal cable. It cannot be removed from the drive unit. For this reason, when removing the drive power cable from the drive unit, it is necessary for an inspection operator of the apparatus to first remove the signal cable from the drive unit and then remove the drive unit cover. Then, when the signal cable is disconnected from the drive unit, the input of the switch drive signal to the switch signal input terminal of the power supply unit through a signal cable is stopped by the switch control circuit, and an output portion of the drive power supply drive The power supply output terminals are disconnected.

  Therefore, when the operator removes the drive unit cover and removes the drive power cable from the drive unit, the power output from the connection with the drive power input terminal of the drive power cable is stopped. ing. In the present invention, the drive unit cover is not removed unless the signal cable is removed from the drive unit without using a complicated configuration such as providing an interlock switch for detecting that the drive power supply cable has been removed from the drive unit. With a simple configuration that cannot be removed, the power output from the power supply unit to the drive power supply cable is stopped when the drive power supply cable is removed from the drive unit with low cost and space saving. can do.

Further, in the first aspect and the second aspect, the power supply unit cover, the diameter larger than the switch signal input terminal, diameter than the connecting portion between the switching signal input terminal of said signal cable is small penetration It is impossible to remove the power supply unit cover from the power supply unit by connecting the connection portion of the signal cable to the switch signal input terminal that has a hole and faces the through hole or protrudes from the through hole. It is said that it is said.

According to the present invention, a simple configuration in which a through hole is provided in the power supply unit cover realizes a configuration in which the power supply unit cover cannot be removed from the power supply unit by the connection portion with the switch signal input terminal of the signal cable. can do.

In the above first and second embodiments, the drive unit cover, the diameter larger than the switch signal output terminal, diameter than the connecting portion between the switching signal output terminal of said signal cable is small penetration It is impossible to remove the drive unit cover from the drive unit by connecting the connection portion of the signal cable to the switch signal output terminal having a hole and facing the through hole. Features.

According to the present invention, a simple configuration in which a through-hole is provided in the drive unit cover realizes a configuration in which the drive unit cover cannot be detached from the drive unit by a connection portion with the switch signal output terminal of the signal cable. can do.

In the first and second aspects, the electric load is a multiphase motor, and the electric load driving circuit includes an inverter circuit that generates and outputs a driving voltage for the multiphase motor. The drive unit is operated by the first control power input terminal and the control power input to the first control power input terminal to control the mode of the drive voltage generated by the inverter circuit. A control power supply for outputting the control power; and a control power cable connecting the output portion of the control power supply and the first control power input terminal. a connecting portion between the switching signal output terminal of the signal cable, the connection between the control power supply input terminal of the control power supply cable, a loaded connector terminal in the same connector, the switch Between the signal output terminal and said first control power supply input terminal, and wherein the desorbed collectively.

According to the present invention, the connection portion between the switch signal output terminal of the signal cable and the connection portion between the control power input terminal of the control power cable are connector terminals mounted on the same connector, and the switch The signal output terminal and the first control power supply input terminal are collectively attached and detached. Therefore, when the signal cable is disconnected from the drive unit, the control power cable is also disconnected from the drive unit, and power supply to the first control power input terminal via the control power cable is stopped. Thus, the drive voltage output control from the inverter circuit by the drive voltage control circuit can be stopped, and the drive voltage output from the inverter circuit to the multiphase motor can be stopped.

The power supply unit includes a second control power input terminal, a control power output terminal, and a short circuit that short-circuits between the second control power input terminal and the control power output terminal, The control power cable connects the first control power input terminal and the control power output terminal, and connects the second control power input terminal and the output part of the control power. The first control power supply input terminal and the control power supply output section are connected via the short circuit, the connection section of the signal cable to the switch signal input terminal, and the control power supply cable control. The connection portion with the power supply output terminal and the connection portion with the second control power input terminal of the control power cable are connector terminals mounted on the same connector, and the switch signal input terminal and the control Between the power supply output terminal and the second control power supply input terminal, and wherein the desorbed collectively.

According to the present invention, the connection portion between the switch signal input terminal of the signal cable, the connection portion between the control power output terminal of the control power cable, and the second control power input terminal of the control power cable. The connecting portion is a connector terminal attached to the same connector, and is detachable in a lump among the switch signal input terminal, the control power output terminal, and the second control power input terminal of the power supply unit. Therefore, when the signal cable is disconnected from the power supply unit, the control power output terminal and the second control power input terminal are also disconnected from the power supply unit. As a result, the supply path of the control power to the drive unit that has been formed through the short circuit of the power supply unit is cut off, and the power supply to the first control power input terminal via the control power cable is cut off. Stops.

  Thus, the drive voltage output control from the inverter circuit by the drive voltage control circuit can be stopped, and the drive voltage output from the inverter circuit to the multiphase motor can be stopped.

  In the first and second aspects, the predetermined power is DC power, the driving power output terminal includes a positive output terminal and a negative output terminal, and the driving power input terminal includes a positive electrode. The drive power cable includes an input terminal and a negative input terminal, and the drive power cable connects the positive output terminal and the positive input terminal, and connects the negative output terminal and the negative input terminal. A first capacitor connected between the positive input terminal and the negative input terminal; a second capacitor connected between the input terminals of the inverter circuit; and a connection between the first capacitor and the second capacitor. And a transformer circuit that transforms the output voltage of the first capacitor and outputs the transformed voltage to the second capacitor, and the drive voltage control circuit is connected to the front terminal from the first control power input terminal. While the input of control power is stopped, the process of operating the transformer circuit to discharge the first capacitor is executed, and the process of discharging the first capacitor is executed by the drive voltage control circuit A backup power supply is provided that supplies the control power to the drive voltage control circuit and terminates the supply of the control power when the execution of the process is completed.

  According to the present invention, when the signal cable is disconnected from the drive unit and the supply of control power from the first control power input terminal is stopped, the drive voltage control circuit causes the first capacitor to be discharged. Executed. And while the discharge process of a 1st capacitor | condenser is performed, the electric power for control is supplied to a drive voltage control circuit with a backup power supply. In this way, by performing the discharge process of the first capacitor, when the operator removes the drive power cable from the drive unit, the drive power input terminal to which the voltage due to the charge of the first capacitor is applied is applied. Touching can be prevented.

  Further, when the signal cable is disconnected from the power supply unit and the supply of control power from the control power supply output terminal is stopped, the drive voltage control circuit executes the discharge process of the first capacitor. And while the discharge process of a 1st capacitor | condenser is performed, the electric power for control is supplied to a drive voltage control circuit with a backup power supply. In this way, by performing the discharge process of the first capacitor, when the operator removes the drive power cable from the power supply unit, the drive power output terminal to which the voltage due to the charge of the first capacitor is applied is applied. Touching can be prevented.

The block diagram of a motor drive device. Explanatory drawing of the attachment aspect of a power supply unit cover. Explanatory drawing of the process of removing a control connector from a power supply unit. Explanatory drawing of the process of removing a power supply unit cover from a power supply unit. Explanatory drawing of the process of removing the power cable for a drive from a power supply unit. Explanatory drawing of the process of removing a control connector from a drive unit. Explanatory drawing of the process of removing a drive unit cover from a drive unit. Explanatory drawing of the process of removing the drive power cable from a drive unit. Explanatory drawing of the process of discharging a capacitor | condenser by a transformer circuit. Explanatory drawing of the other connection aspect of the power cable for control.

  An embodiment of the present invention will be described with reference to FIGS.

  Referring to FIG. 1, the electric load driving device of the present embodiment drives a three-phase DC brushless motor 1 (corresponding to the electric load and the multiphase motor of the present invention, hereinafter referred to as motor 1). Used in hybrid vehicles and electric vehicles. The electric load driving device of the present embodiment includes a driving unit 30 that outputs driving power to the motor 1, a power supply unit 10 that supplies operating power to the driving unit, and a control power supply 100 (for example, a battery). .

  The drive unit 30 and the power supply unit 10 are connected by drive power cables 60 and 70, a signal cable 80, and a control power cable 81. The control power supply 100 and the power supply unit 10 are connected by a control power cable 82.

  The power supply unit 10 includes batteries 11a and 11b, a switch 12 and a fuse 13 connected between the batteries 11a and 11b, a positive output terminal 16 connected to the positive electrode of the battery 11a, a contactor 14, and a relay switch 15a of the contactor 14 ( The negative output terminal 17 connected to the negative electrode of the battery 11b via the switch circuit of the present invention) and four connection terminals (the drive coil 15b of the contactor 14 (corresponding to the switch control circuit of the present invention)) A first control connector 18 having a first terminal 18a (corresponding to a switch signal input terminal of the present invention) and a fourth terminal 18d, a second terminal 18b and a third terminal 18c short-circuited by a short circuit 19) connected to And.

  The first control connector 18 is fitted with the second control connector 91, whereby the first terminal 18 a of the first control connector is connected to the first terminal 91 a (connected to the signal cable 80) of the second control connector 91. The second terminal 18b of the first control connector is electrically connected to the first terminal 91b (connected to the control power cable 81) of the second control connector 91, and the third terminal 18c of the first control connector is connected to the first terminal 91b. 2 Conducting with the third terminal 91c of the control connector 91 (connected to the control power cable 82), the fourth connection terminal 18d of the first control connector 18 is connected to the fourth terminal 91d (ground cable) of the second control connector 91. 83 is connected).

  Here, with reference to FIG. 2A and FIG. 2B, an attachment mode of the power supply unit cover 20 will be described. 2A shows the power supply unit cover 20 in a cross-sectional view and shows a connection state of cables, and FIG. 2B shows a front view of the power supply unit cover 20.

  The power supply unit cover 20 covers the connection location between the second terminal 62 and the positive output terminal 16 of the drive power cable 60 and the connection location between the second terminal 72 and the negative output terminal 17 of the drive power cable 70. It is fixed to the casing 10 a of the power supply unit 10 by bolts 21 and 22.

  Further, the first control connector 18 is exposed from the through hole 25 provided in the power supply unit cover 20 and is fitted to the second control connector 91, and the diameter of the second control connector 91 is the diameter of the through hole 25. Bigger than. Therefore, the power supply unit cover 20 cannot be removed from the power supply unit 10 unless the second control connector 91 is removed from the first control connector 18.

  Next, referring to FIG. 1, the drive unit 30 includes an inverter circuit 31 that generates a three-phase drive voltage to be supplied to the motor 1, a second capacitor 33 connected to the input portion of the inverter circuit 31, and a drive power supply. The positive input terminal 37 connected to the first terminal 61 of the cable 60, the negative input terminal 38 connected to the first terminal 71 of the driving power cable 70, and the first connected to the positive input terminal 37 and the negative input terminal 38. Drive voltage control for controlling the operation of the transformer circuit 32, the inverter circuit 31 and the transformer circuit 32 connected between the first capacitor 34 and the resistor 35, the first capacitor 34 and the second capacitor 33, and outputting the switch drive signal The circuit 36 (including the function of the switch drive circuit of the present invention) and three connection terminals (the first terminal 39a connected to the output line of the switch drive signal (the present invention) Corresponding to the switch signal output terminal), a second terminal 39b connected to the input line of the control power supply, and a third control connector 39 having a third terminal 39c) which is connected to the ground input line.

  The inverter circuit 31, the first capacitor 34, the second capacitor 33, and the transformer circuit 32 constitute an electric load driving circuit of the present invention.

  The third control connector 39 is fitted with the fourth control connector 90, whereby the first terminal 39a of the third control connector 39 is connected to the first terminal 90a of the fourth control connector 90 (connected to the signal cable 80). And the second terminal 39b of the third control connector 39 is electrically connected to the second terminal 90b (connected to the control power cable 80) of the fourth control connector 90, and the third terminal of the third control connector 39 The terminal 39c is electrically connected to the third terminal 90c (connected to the ground cable 84) of the fourth control connector 90.

  Similarly to the power supply unit cover 20 described above, the drive unit cover 40 attached to the drive unit 30 with bolts 41 and 42 allows the connection place between the first terminal 61 and the positive input terminal 37 of the drive power supply cable 60, In addition, the connection portion between the first terminal 71 and the negative input terminal 38 of the driving power cable 70 is covered.

  The third control connector 39 is exposed from the through hole 45 provided in the drive unit cover 40 and is fitted to the fourth control connector 90. The diameter of the fourth control connector 90 is the diameter of the through hole 45. Bigger than. Therefore, the drive unit cover 40 cannot be removed from the drive unit 30 unless the fourth control connector 90 is removed from the third control connector 39.

  Next, with reference to FIG. 3 to FIG. 5, a procedure when an inspection operator of the hybrid vehicle removes the drive power cables 60 and 70 from the power supply unit 10 will be described.

  First, referring to FIG. 3, the operator removes the second control connector 91 from the first control connector 18. As a result, the output of the switch drive signal from the drive unit 30 to the power supply unit 10 via the signal cable 80 is stopped, and the relay switch 15a is turned off (blocked state), so that the power supply unit 10 to the drive unit 30 is turned off. The drive power supply stops.

  At this time, on the drive unit 30 side, the power supply from the control power supply 100 via the control power cable 81 is stopped, so the drive voltage control circuit 36 stops operating and the inverter 31 drives the motor 1. Voltage output stops. In addition, since the power supply via the driving power cables 60 and 70 is stopped, the charge charged in the first capacitor 34 is discharged via the resistor 35.

  Next, referring to FIG. 4, the operator removes bolts 21 and 22 and removes power supply unit cover 20 from power supply unit 10. Then, referring to FIG. 5, the operator removes second terminal 62 of drive power cable 60 from positive output terminal 16 and removes second terminal 72 of drive power cable 70 from negative output terminal 17.

  In this case, since the relay switch 15a is already in the OFF state, even if the operator touches the positive electrode output terminal 16 and the negative electrode output terminal 17, the voltage from the batteries 11a and 11b is not applied to the operator. In addition, since the first capacitor 34 is discharged, even if an operator touches the positive electrode output terminal 62 or the negative electrode input terminal 72, a voltage due to the electric charge charged in the first capacitor 34 is not applied.

  Next, with reference to FIGS. 6 to 8, a procedure when the operator removes the drive power cables 60 and 70 from the drive unit 30 will be described.

  First, referring to FIG. 6, the operator removes the fourth control connector 90 from the third control connector 39. As a result, the output of the switch drive signal from the drive unit 30 to the power supply unit 10 via the signal cable 80 is stopped, and the relay switch 15a is turned off (blocked state), so that the power supply unit 10 to the drive unit 30 is turned off. The drive power supply stops.

  At this time, on the drive unit 30 side, the power supply from the control power supply 100 via the control power cable 81 is stopped, so the drive voltage control circuit 36 stops operating and the inverter 31 drives the motor 1. Voltage output stops. In addition, since the power supply via the driving power cables 60 and 70 is stopped, the charge charged in the first capacitor 34 is discharged via the resistor 35.

  Next, referring to FIG. 7, the operator removes bolts 41 and 42 and removes drive unit cover 40 from drive unit 30. Then, referring to FIG. 8, the operator removes first terminal 61 of drive power cable 60 from positive input terminal 37 and removes first terminal 71 of drive power cable 70 from negative input terminal 38.

  In this case, since the relay switch 15a is already in the OFF state, even if the operator touches the first terminal 61 of the driving power cable 60 or the first terminal 71 of the driving power cable 70, the battery 11a is notified to the operator. , 11b, no voltage is applied. Further, since the first capacitor 34 is discharged, even if an operator touches the positive input terminal 37 or the negative input terminal 38, a voltage due to the electric charge charged in the first capacitor 34 is not applied.

  In the present embodiment, the power supply unit cover 20 and the drive unit cover 40 are provided, so that the operator removes the drive power cables 60 and 70 from the power supply unit 10 and the drive power cable 60 from the drive unit 30. , 70 in both cases where the voltage output from the power supply unit 10 is prevented from being applied to the operator, but even if only one of the power supply unit cover 20 and the drive unit cover 40 is provided, The effects of the present invention can be obtained.

  Further, as shown in FIG. 9, a relay 115 for switching between connection and disconnection between the control power supply 100 and the drive voltage control circuit 36 is connected to the drive voltage control circuit 36 via connectors 110 and 111, and the control is performed. The drive voltage control circuit 36 that has detected that the connection with the control power supply 100 via the power cable 80 is cut off energizes the drive coil 112 of the relay 115 to turn on the relay switch 115 (conducting state). The power supply to the drive voltage control circuit 36 may be continued.

  Thus, when the second control connector 91 of the control power cable 80 is disconnected from the power supply unit 10 or when the fourth control connector 90 of the control power cable 80 is disconnected from the drive unit 30, the driving is performed. The voltage control circuit 36 may switch the transistors 50 and 51 of the transformer circuit 32 to move charges between the first capacitor 34 and the second capacitor 33, thereby discharging the first capacitor 34.

  In this case, the discharge resistor 35 can be dispensed with. The drive voltage control circuit 36 stops energization of the drive coil 112 of the relay 115 when the discharge of the capacitor 1 is finished, and disconnects the connection between the drive unit 30 and the drive power supply 100. In this case, the backup power source of the present invention is constituted by the relay 115 and the control power source 100.

  When it is not necessary to stop the operation of the drive voltage control circuit 36 of the drive unit 30 when the second control connector 91 is removed from the power supply unit 10, as shown in FIG. The drive unit 30 may be connected without using the power supply unit 10.

  In the present embodiment, the electric load driving device including the driving unit 30 that drives the motor 1 is shown as the electric load of the present invention. However, the target electric load is not limited to the motor, and air conditioning equipment, lighting, etc. The present invention can also be applied to an electric load driving device including a driving unit for driving other types of electric loads.

  DESCRIPTION OF SYMBOLS 1 ... Motor, 10 ... Power supply unit, 14 ... Relay switch, 16 ... Positive electrode output terminal, 17 ... Negative electrode output terminal, 18 ... 1st control connector, 19 ... Short circuit, 20 ... Power supply unit cover, 30 ... Drive unit, 31 Inverter circuit 32 Transformer circuit 36 Drive voltage control circuit 37 Positive input terminal 38 Negative input terminal 40 Drive unit cover 60, 70 Drive power cable 80 Signal cable 81 Control power cable, 100... Control power supply.

Claims (8)

A power supply input terminal for driving, a switch signal output terminal, a switch drive circuit for outputting a predetermined switch drive signal to the switch signal output terminal, and a power input from the power supply input terminal for driving, A drive unit comprising an electrical load drive circuit for supplying drive power to the electrical load;
A drive power supply output terminal, a switch signal input terminal, a drive power supply that outputs predetermined power, a switch circuit that switches between an output unit of the drive power supply and the drive power supply output terminal between a conduction state and a cutoff state; When the switch drive signal is input to the switch signal input terminal, the switch circuit brings the drive power supply output section and the drive power supply output terminal into a conductive state, and the switch signal input terminal has the switch A power supply unit comprising a switch control circuit that shuts off the drive power supply output terminal and the drive power supply output terminal by the switch circuit when no drive signal is input;
A drive power cable connecting the drive power input terminal and the drive power output terminal;
A signal cable connecting the switch signal input terminal and the switch signal output terminal;
Covering the connection portion between the drive power output terminal and the drive power cable, and making the signal cable unremovable from the power unit by the connection portion with the switch signal input terminal, the signal cable An electric load driving device comprising: a power supply unit cover that can be removed from the power supply unit by being removed from a switch signal input terminal. The electric load driving device according to claim 1,
The connection portion between the drive power input terminal and the drive power cable is covered, and the signal cable is disabled from being removed from the drive unit by the connection portion with the switch signal output terminal. An electric load drive device comprising a drive unit cover that can be removed from the drive unit by being removed from a switch signal output terminal. A power supply input terminal for driving, a switch signal output terminal, a switch drive circuit for outputting a predetermined switch drive signal to the switch signal output terminal, and a power input from the power supply input terminal for driving, A drive unit comprising an electrical load drive circuit for supplying drive power to the electrical load;
A drive power supply output terminal, a switch signal input terminal, a drive power supply that outputs predetermined power, a switch circuit that switches between an output unit of the drive power supply and the drive power supply output terminal between a conduction state and a cutoff state; When the switch drive signal is input to the switch signal input terminal, the switch circuit brings the drive power supply output section and the drive power supply output terminal into a conductive state, and the switch signal input terminal has the switch A power supply unit comprising a switch control circuit that shuts off the drive power supply output terminal and the drive power supply output terminal by the switch circuit when no drive signal is input;
A drive power cable connecting the drive power input terminal and the drive power output terminal;
A signal cable connecting the switch signal input terminal and the switch signal output terminal;
The connection portion between the drive power input terminal and the drive power cable is covered, and the signal cable is disabled from being removed from the drive unit by the connection portion with the switch signal output terminal. An electric load drive device comprising: a drive unit cover that can be removed from the drive unit by being removed from the switch signal output terminal. In the electric load driving device according to claim 1 or 2,
It said power supply unit cover, the diameter larger than the switch signal input terminal, the diameter of the connection portion between the switch signal input terminal has a small through-hole, said through hole and facing or through hole of the signal cable An electric load driving device characterized in that the connection of the signal cable is connected to the switch signal input terminal protruding from the power supply unit so that the power supply unit cover cannot be removed from the power supply unit. In the electric load driving device according to claim 2 or 3,
The drive unit cover, the diameter larger than the switch signal output terminal, wherein the diameter of the connection portion between the switch signal output terminal having a small through-hole, said through hole and facing or through hole of the signal cable An electrical load driving device characterized in that the connecting portion of the signal cable is connected to the switch signal output terminal projecting from the terminal so that the driving unit cover cannot be detached from the driving unit. In the electric load driving device according to any one of claims 1 to 5,
The electrical load is a multiphase motor;
The electric load driving circuit has an inverter circuit that generates and outputs a driving voltage for the multiphase motor,
The drive unit is operated by a first control power input terminal and control power input to the first control power input terminal, and controls the mode of the drive voltage generated by the inverter circuit. A voltage control circuit,
A control power supply for outputting the control power;
A control power cable connecting the output portion of the control power supply and the first control power input terminal;
The connection portion of the signal cable with the switch signal output terminal and the connection portion of the control power cable with the control power input terminal are connector terminals attached to the same connector, and the switch signal output An electric load driving device characterized in that the electric load driving device is detachable in a lump between the terminal and the first control power input terminal. The electric load driving device according to claim 6, wherein
The power supply unit includes a second control power input terminal, a control power output terminal, and a short circuit that short-circuits between the second control power input terminal and the control power output terminal.
The control power cable connects the first control power input terminal and the control power output terminal, and connects the second control power input terminal and the output part of the control power. , Connecting the first control power input terminal and the control power output through the short circuit,
Connection between the switch cable input terminal of the signal cable, a connection between the control power output terminal of the control power cable, and the second control power input terminal of the control power cable And a connector terminal attached to the same connector, wherein the switch signal input terminal, the control power output terminal, and the second control power input terminal are collectively attached and detached. An electric load driving device. The electric load driving device according to claim 6 or 7,
The predetermined power is DC power,
As the drive power output terminal, a positive output terminal and a negative output terminal are provided,
As the drive power input terminal, a positive input terminal and a negative input terminal are provided,
The drive power cable connects the positive output terminal and the positive input terminal, connects the negative output terminal and the negative input terminal,
The electrical load driving circuit includes a first capacitor connected between the positive input terminal and the negative input terminal, a second capacitor connected between the input terminals of the inverter circuit, the first capacitor, and the A transformer circuit connected between the second capacitors, transforming the output voltage of the first capacitor and outputting the transformed voltage to the second capacitor;
The drive voltage control circuit performs a process of operating the transformer circuit to discharge the first capacitor when the input of the control power from the first control power input terminal is stopped,
While the process for discharging the first capacitor is being performed by the drive voltage control circuit, the control power is supplied to the drive voltage control circuit, and the control power is supplied when the process is completed. An electric load driving device comprising a backup power source for terminating the operation.

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