JP2014233171A - Inverter unit and motor driver - Google Patents

Abstract

A printed wiring board requires two or more wiring layers due to restrictions on the arrangement of a positive connection terminal and a negative connection terminal to which a power supply capacitor of a high voltage gate driver IC is connected. It was. In the inverter means, the positive and negative connection terminals of the first capacitor for power supply are arranged adjacent to each other, and the positive connection terminal of the second capacitor is the positive connection terminal of the first capacitor. The positive side connection terminal of the third capacitor is arranged adjacent to the positive side connection terminal of the second capacitor, while the negative side connection terminal of the second capacitor is the first side connection terminal. The negative connection terminal of the third capacitor is disposed adjacent to the negative connection terminal of the capacitor, and the negative connection terminal of the third capacitor is disposed adjacent to the negative connection terminal of the second capacitor. [Selection] Figure 2

Description

  The present invention relates to a motor drive device having an inverter means as a constituent element.

  Mainly a plurality of switching elements for supplying power to a plurality of phase windings from a DC power source, a plurality of high voltage gate driver ICs for controlling on / off of the switching elements, and a control means for inputting a control signal to the gate driver In general, a motor driving device is configured.

  In recent years, as the inverter means, the switching element and the high-breakdown-voltage gate driver IC are integrated into one body, or the switching element, the high-breakdown-voltage gate driver IC and the control means are combined into a motor drive device. Therefore, the printed wiring board on which the inverter means is mounted can be configured easily and inexpensively (for example, see Non-Patent Document 1).

  FIG. 3 shows a circuit configuration diagram of a conventional motor driving device and conventional inverter means in a three-phase motor. The conventional motor driving device 44 is composed mainly of inverter means 45 including switching elements 34 to 39 and high voltage gate driver ICs 31 to 33, control means 30, and capacitors 7 to 9 for power supply.

  The circuit configuration diagram shown in FIG. 3 employs a bootstrap system, charges power supply capacitors 7-9 through a diode (not shown), and turns on / off switching elements 34-36 on the high side. Is supplied to the high voltage gate driver ICs 31-33.

  The capacitor 7 is connected between the positive connection terminal 4 connected to the high breakdown voltage gate driver IC 31 and the negative connection terminal 1 connected to the connection point of the high breakdown voltage gate driver IC 31, the switching element 34 and the switching element 37. Is done.

  The capacitor 8 has a positive-side connection terminal 5 connected to the high-voltage gate driver IC 32, an output terminal 14 that also serves as a negative-side connection terminal to which the connection point of the high-voltage gate driver IC 32, the switching element 35, and the switching element 38 is connected. Connected between.

  The capacitor 9 has a positive-side connection terminal 6 connected to the high-voltage gate driver IC 33 and an output terminal 15 that also serves as a negative-side power supply terminal connected to the connection point of the high-voltage gate driver IC 33, the switching element 36, and the switching element 39. Connected between.

  The high-breakdown-voltage gate driver ICs 31 to 33 receive control signals from the control means 30 connected to the outside, respectively output control signals to the corresponding switching elements 34 to 39, and turn on / off the switching elements 34 to 39. Do.

  As a result, from the direct current power supplied from the positive power supply terminal 16 of the inverter and the negative power supply terminal 46 of the inverter, the output terminal 13 connected to the connection point of the switching element 34 and the switching element 37, the switching element 35 and the switching element Power is supplied to the three-phase motor through the output terminal 14 connected to the connection point 38 and the output terminal 15 connected to the connection point of the switching element 36 and the switching element 39. Here, the ground terminal 17 is a ground terminal of the high voltage gate driver ICs 31 to 33.

Integrated Power Module for Small Application Motor Drive Applications (model number IRSM 836-035MA), [online], February 3, 2013, International Rectifier, [http: //www.tww, 2013] irf-japan. com / whats-new / news12 / jp120516. html>

  FIG. 4 shows a plan view of the terminal arrangement of the conventional inverter means 45 corresponding to FIG. 3, and a connection diagram of the conductive printed pattern when the inverter means 45 is mounted on a printed wiring board. In FIG. 4, the sides 23 to 26 of the package outer shape of the inverter means are provided with high voltage gate driver ICs 31 to 33 and switching elements 34 to 39 (not shown) in the package, and through terminal portions arranged on the back surface of the package. Electrical connection is made with the conductive printed pattern.

  Here, although not shown in the figure, terminals or the like for inputting a control signal from the control means 30 are arranged on the side 26 of the package outer shape, and these terminals are also electrically connected by a conductive print pattern. .

  Here, the positive connection terminal 4 and the negative connection terminal 1 for connecting the capacitor 7 are arranged adjacent to the side 23, and the positive connection terminal 5 for connecting the capacitor 8 is arranged adjacent to the positive connection terminal 4. The positive side connection terminal 6 for connecting the capacitor 9 is disposed adjacent to the positive side connection terminal 5.

  On the other hand, the negative side connection terminals for connecting the capacitors 8 and 9 are the output terminal 14 and the output terminal 15, and are arranged on the side 25. For this reason, if the capacitor 8 is to be connected by the conductive printed pattern 11, the conductive printed patterns 18, 21, and 22 cross each other. Therefore, a board front / back connecting means 27 such as a VIA hole or a jumper is provided to cross the patterns. It is necessary to avoid connection.

  Similarly, if the capacitor 9 is to be connected by the conductive printed pattern 12, the conductive printed patterns 18 and 22 are crossed. Therefore, a board front / back connecting means 27 such as a VIA hole or a jumper is provided to avoid crossing the patterns. Need to connect. For this reason, electrical connection cannot be made on the same plane, and the wiring layer of the printed wiring board requires two or more layers.

  Conversely, when the conductive print patterns 11 and 12 that connect the capacitor 8 and the capacitor 9 are connected in the same plane, the conductive print patterns 18, 21, and 22 are provided with the board front / back connection means 27 to avoid pattern crossing. It is necessary that two wiring layers of the substrate are necessary.

  In order to perform wiring on the same plane, there is a method in which the conductive print patterns 11 and 12 are connected through the back surface of the inverter means 45. However, the conductive print patterns 11 and 12 have a high voltage, and the conductive print pattern 11 It is difficult to make a connection while maintaining the insulation distance between the conductive print patterns 12 and the other insulation terminal 45 and the other insulation terminals.

The conventional inverter means and the conventional motor driving device are configured as described above, and the positive side connection terminal for connecting the power supply capacitor of the high voltage gate driver IC for turning on / off the high side switching element and the negative side The conductive printed pattern on the printed wiring board intersects in the same plane due to the restrictions on the terminal arrangement of the connection terminals, and therefore the wiring layer of the printed wiring board requires two or more layers, which increases the cost. .

  An object of the present invention is to solve the above-described problems, and to reduce the number of wiring layers of a printed wiring board and to provide an inexpensive motor driving device.

  In order to solve the above-mentioned problem, the inverter means of the present invention is arranged such that the positive and negative connection terminals of the first capacitor for power supply are adjacent to each other, and the positive connection terminal of the second capacitor is the first capacitor. The capacitor is disposed adjacent to the positive connection terminal of the capacitor, the positive connection terminal of the third capacitor is disposed adjacent to the positive connection terminal of the second capacitor, and so on. The negative connection terminal of the second capacitor is disposed adjacent to the negative connection terminal of the first capacitor, and the negative connection terminal of the third capacitor is adjacent to the negative connection terminal of the second capacitor. It was set as the structure which arrange | positions sequentially and so on.

  Thereby, the wiring layer of a printed wiring board can be reduced and an inexpensive motor drive device can be provided.

  According to the inverter means of the present invention, the wiring layer of the printed wiring board can be a single layer, and the motor drive device can be configured at low cost.

1 is a circuit configuration diagram of a motor drive device and inverter means in Embodiment 1 of the present invention. Terminal arrangement diagram of inverter means and conductive print pattern connection diagram in embodiment 1 of the present invention Circuit diagram of conventional motor drive unit and conventional inverter means Terminal arrangement of conventional inverter means and connection diagram of conductive printed pattern

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a circuit configuration diagram of the motor drive device of the present invention and the inverter means of the present invention in the embodiment of the present invention. 1, the inverter means 43 is the same as the conventional inverter means 45 shown in FIG. 3 in that it is composed of high voltage gate driver ICs 31-33 and switching elements 34-39. In the present invention, the negative connection terminal 2 for connecting the capacitor 8 and the negative connection terminal 3 for connecting the capacitor 9 are newly provided.

  FIG. 2 shows a plan view of the terminal arrangement of the inverter means 43 corresponding to FIG. 1 and a connection diagram of the conductive printed pattern when the inverter means 43 is mounted on the printed wiring board.

  In FIG. 2, sides 23 to 26 show the package outline of the inverter means 45. High voltage gate driver ICs 31 to 33 and switching elements 34 to 39 (not shown) are accommodated in the package and arranged on the back side of the package. Electrical connection is made with each conductive print pattern via each terminal, and although not shown, terminals 26 for inputting control signals from the control means 30 are arranged on the side 26, and these Similarly to the conventional inverter means 43 shown in FIG. 4, the terminals are also electrically connected by a conductive printed pattern.

  Further, the positive side connection terminal 4 and the negative side connection terminal 1 for connecting the capacitor 7 are arranged adjacent to the side 23, and the positive side connection terminal 5 for connecting the capacitor 8 is arranged adjacent to the positive side connection terminal 4. The positive side connection terminal 6 for connecting the capacitor 9 is arranged adjacent to the positive side connection terminal 5 as in the conventional inverter means 43 of FIG.

  Here, in the present invention, a negative side connection terminal 2 for connecting the capacitor 8 is newly provided, arranged adjacent to the negative side connection terminal 1 of the capacitor 7, and a negative side connection terminal 3 of the capacitor 9 is newly provided. And provided adjacent to the negative connection terminal 2 to which the capacitor 8 is connected.

  By arranging the terminals for connecting the capacitor 8 and the capacitor 9 as described above, the conductive printed patterns 10 to 12 and 18 to 22 for electrical connection with the inverter means 43 are not crossed in the same plane. The wiring layer of the substrate that embodies the motor driving device can be a single layer, and a motor driving device can be configured with a printed wiring board made inexpensive.

  Although the above is an example of a three-phase inverter, the positive-side and negative-side connection terminals of the first capacitor are arranged adjacent to each other in the multi-phase inverter, and the positive-side connection terminal of the second capacitor. Are arranged on the positive side connection terminal of the first capacitor, the positive side connection terminal of the third capacitor is arranged adjacent to the positive side connection terminal of the second capacitor, and so on, The negative connection terminal of the second capacitor is disposed adjacent to the negative connection terminal of the first capacitor, and the negative connection terminal of the third capacitor is adjacent to the negative connection terminal of the second capacitor. In this way, the capacitor positive side connection terminal and the negative side connection terminal of the inverter means can be electrically connected with a conductive print pattern that does not intersect with the others. Can, printed wiring board Wiring layers it is possible to make the first layer can be configured a motor drive device that less expensive substrates.

  As described above, since the inverter means according to the present invention can reduce the cost of the printed wiring board on which the inverter means is mounted, it is useful for reducing the cost of various devices in which the inverter is mounted.

1, 2, 3 Negative side connection terminal 4, 5, 6 Positive side connection terminal 7, 8, 9 Capacitor 10, 11, 12 Conductive printed pattern 13, 14, 15 Output terminal 16, 46 Power supply terminal 17 Ground terminal 18, 19, 20, 21, 22 Conductive print pattern 23, 24, 25, 26 Side 27 Substrate front / back connection means 30 Control means 31, 32, 33 High voltage gate driver IC
34, 35, 36, 37, 38, 39 Switching element 42, 44 Motor drive device 43, 45 Inverter means

Claims (3)

A multi-phase inverter means having a power supply capacitor connection terminal of a high voltage gate driver IC for turning on / off a high side switching element, the positive side and negative side connection terminals of a first capacitor for power supply Are arranged adjacent to each other, the positive connection terminal of the second capacitor is arranged adjacent to the positive connection terminal of the first capacitor, and the positive connection terminal of the third capacitor is connected to the second capacitor. The negative connection terminal of the second capacitor is disposed adjacent to the negative connection terminal of the first capacitor, and the negative connection terminal of the third capacitor is disposed adjacent to the negative connection terminal of the first capacitor. Inverter means arranged adjacent to the negative connection terminal of the second capacitor. 2. The inverter means according to claim 1, wherein all of the positive side and negative side connection terminals of the first to third capacitors are provided on one side of the package outer shape. A motor drive device comprising the inverter means according to claim 1.