JP2005323417A - Power converter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power converter capable of highly efficient high quality management of power module characteristic data and learning regulation in power unit manufacturing process. <P>SOLUTION: The power converter comprising a power module 2 encapsulating a switching element for power conversion and a temperature sensor section for detecting the temperature of the switching element, and a control board 1 having a control circuit section for controlling the switching element is further provided with a recording section 7 for converting the characteristic data of the power module 2 into a predetermined recording medium and holding that recording medium. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power conversion device, and more particularly to a power conversion device that performs power conversion by switching a switching element.

  FIG. 1 is a schematic diagram illustrating a general configuration of a power conversion apparatus that converts a DC power source into three-phase AC to drive an AC load such as a three-phase AC motor. In this figure, the power module 2 includes a resin-encapsulated switching element that converts power from DC to AC, a flywheel diode that converts power from three-phase AC to DC, and a temperature sensor that detects the temperature of the switching element. There are a number of them that are stopped.

In addition, a control circuit unit that controls the switching elements is mounted on the control board 1.
The smoothing capacitor 4 suppresses fluctuations in the voltage of the DC power supply supplied to the switching element, and smoothes voltage jumps and the like. The insert case 5 is for assembling the power module 2, the control board 1, and the smoothing capacitor 4 as described above and attaching them to the heat sink 3. The heat sink 3 discharges heat generated from the power module 2 into the air by the switching operation of the switching element.

  In the manufacturing process of the power conversion device configured as described above, a learning adjustment device (not shown) that generates learning adjustment data by communicating between the control circuit unit in the control board 1 and the control board 1. Are used to calculate the characteristic data of each power module 2 and store the calculated data in the control circuit section in the control board 1.

  As shown in the flowchart of FIG. 5, the storage procedure is as follows. In step S1, the heat sink 3 with the insert case 5 assembled with each power module 2 is prepared. In step S2, each power module 2 is assembled in which position. Make sure that After that, in step S3, characteristic data measured in advance for each power module 2 is prepared.

  Next, the control board 1 and the smoothing capacitor 4 are assembled | attached to the insert case 5 in which each power module 2 was assembled | attached by step S4. Thereafter, the power unit assembled in step S5 is set in the learning adjustment device, and the operator manually inputs the characteristic data of each power module 2 prepared in step S6 into the learning adjustment device. Next, a learning adjustment program is executed in step S7, arithmetic processing is performed between the learning adjustment device and the control board 1, and characteristic data is stored in the control circuit unit of the control board 1 to complete the learning adjustment.

  There is also an example in which a two-dimensional bar code is attached to each semiconductor chip, lead frame, or package product for the purpose of improving the efficiency of information management in the semiconductor manufacturing process. (For example, refer to Patent Document 1).

Japanese Patent Laid-Open No. 11-26333

  The conventional power converter is configured as described above, and the operator manually inputs the characteristic data of the power module. Therefore, in addition to the occurrence of data input mistakes, the work efficiency is reduced, and the quality and cost during manufacturing are adversely affected. There was a problem that there is a possibility of affecting.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a high-quality and low-cost power conversion device.

  A power conversion device according to the present invention includes a power module in which a switching element for power conversion and a temperature sensor unit for detecting the temperature of the switching element are sealed, and a control board having a control circuit unit for controlling the switching element. The power conversion apparatus includes a recording unit that converts the characteristic data of the power module into a predetermined recording medium and holds the recording medium.

  Since the power conversion device according to the present invention is configured as described above, learning adjustment can be performed accurately and quickly using the characteristic data held in the recording unit, and the quality of the learning adjustment process can be improved. It enables automation and high efficiency.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing a general configuration of, for example, an in-vehicle power converter, FIG. 2 is a schematic diagram showing a configuration of a power module in Embodiment 1, (a) is a front view, and (b) is a front view. It is a side view. 3 is a schematic diagram showing the overall configuration of the first embodiment, where (a) is a front view and (b) is a side view.

  As shown in FIG. 1, the power conversion device according to the first embodiment includes a switching element that converts power from DC to AC, a flywheel diode that converts power from three-phase AC to DC, and detects the temperature of the switching element. A plurality of power modules 2 formed by resin-sealing a temperature sensor unit, a control board 1 having a control circuit unit for controlling the switching element, and a smoothing for suppressing voltage fluctuations of a power source supplied to the switching element An insert case 5 integrally assembled with a capacitor 4 is mounted on a heat sink 3 for heat dissipation.

  Further, as shown in FIG. 2, each power module 2 is provided with a recording unit 6 that converts its own characteristic data into a predetermined recording medium, for example, a barcode, and holds the barcode. The data content of the barcode of the recording unit 6 includes the temperature of the power module 2 itself when the power module 2 is at an arbitrary temperature, and the forward voltage value of the temperature sensor unit configured by a diode built in the power module 2. And are recorded. Note that reference numeral 2a in FIG.

  FIG. 3 shows an example in which an insert case 5 in which three power modules 2 are assembled is mounted on the heat sink 3. In addition to the characteristic data recorded in the recording unit 6 of the power module 2, the power module 2 An ASSY data recording unit 7 made of, for example, a bar code, in which ASSY data including position data for recognizing which position of the heat sink 3 is assembled, is recorded on a part of the heat sink 3.

  In addition, the control board 1 reads the forward voltage value of the temperature sensor unit composed of a diode built in the power module 2 in order to monitor the temperature state of the power module 2. In this case, since the forward voltage-temperature characteristics of the temperature sensor composed of diodes vary, a learning adjustment process is provided during the power unit manufacturing process to correct the variation.

  FIG. 4 is a flowchart illustrating an example of the learning adjustment process according to the first embodiment. That is, in step S11, first, the heat sink 3 on which the insert case 5 to which the power module 2 is assembled is mounted is prepared. Next, in step S12, the characteristic data of the recording unit 6 of each power module 2 and the position data of the power module 2 are read, an ASSY data recording unit is issued, and attached to the heat sink 3.

  Next, in step S13, the control board 1 is mounted on the heat sink 3 in which each power module 2 is assembled, and the power unit assembled in step S14 is set in the learning adjustment device. Thereafter, in step S15, the barcode that is the data of the ASSY data recording unit 7 attached to the heat sink 3 is read by the learning adjustment device.

  The learning adjustment apparatus generates learning adjustment data based on the barcode data read in step S16, executes the learning adjustment program, and transmits the learning adjustment program to the control board 1. The learning adjustment data transmitted from the learning adjustment device is stored in a storage element such as an EEPROM provided in the control circuit unit in the control board 1 to complete the learning adjustment.

  The control board 1 accurately recognizes the temperature of the power module 2 by the forward voltage value read from the temperature sensor unit of the power module 2 based on the learning adjustment data stored in the storage element such as the EEPROM, A control signal corresponding to the state is generated.

  Since the first embodiment is configured as described above, it is possible to omit the confirmation of the position of each power module 2, preparation of data in advance, and manual input of characteristic data of the power module 2, which have been conventionally required. Become.

  Moreover, although the thing of patent document 1 uses the barcode, it is the main purpose of the information management of the semiconductor device in the in-process distribution of each manufacturing process, but this invention is a recording part of a power module. 6 and the ASSY data recording unit 7 are used to perform learning adjustment at the time of manufacture using the characteristic data of the power module 2, thereby improving the temperature measurement accuracy of the product.

It is the schematic which shows the general structure of the vehicle-mounted power converter device. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which shows the structure of the power module in Embodiment 1 of this invention, (a) is a front view, (b) is a side view. It is the schematic which shows the whole structure of Embodiment 1, (a) is a front view, (b) is a side view. 3 is a flowchart illustrating an example of a flow of a learning adjustment process in the first embodiment. It is a flowchart which shows the flow of the learning adjustment process in the conventional power converter device.

Explanation of symbols

1 control board, 2 power module, 3 heat sink,
4 smoothing capacitor, 5 insert case, 6 recording section,
7 ASSY data recording unit.

Claims (3)

  In a power conversion device comprising: a power module in which a switching element for power conversion and a temperature sensor unit for detecting the temperature of the switching element are sealed; and a control board having a control circuit unit for controlling the switching element. A power conversion apparatus comprising: a module that converts module characteristic data into a predetermined recording medium, and a recording unit that holds the recording medium.   The power conversion apparatus according to claim 1, wherein the recording medium is a bar code.   Learning adjustment means for reading the characteristic data and performing learning adjustment, storage means for storing the result of the learning adjustment, and control means for controlling the power module based on the stored contents of the storage means The power converter according to claim 1, wherein

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