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A/D conversion apparatus

An analog-to-digital conversion and conversion technology, which is applied in the direction of analog-to-digital converter, electronic commutator, electronic commutation motor control, etc. The effect of reducing register resources and reducing costs

Active Publication Date: 2011-11-16
PANASONIC SEMICON SOLUTIONS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the chip area of ​​the motor control microcomputer 907 constituting the motor current sensorless control device increases, resulting in an increase in the cost of the motor control microcomputer 907.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] Hereinafter, Embodiment 1 of the present invention will be described using the drawings.

[0121] Figure 5 It is a configuration diagram showing the configuration of the three-parallel resistance sensorless sine wave motor drive control device 100 according to the first embodiment of the present invention.

[0122] Such as Figure 5 As shown, the three-parallel resistor sensorless sine wave motor drive control device 100 has: a sine wave drive three-phase motor 105, a motor control power supply assembly 106, a microcomputer 107 for motor control, three parallel resistors 108, a motor current amplification circuit 109, Analog-to-digital conversion unit 110.

[0123] Drive the motor current of the three-phase motor 105 driven by the sine wave in the sensorless sine wave motor drive control device 100 with three parallel resistors, and control the inside of the power supply unit 106 by switching the motor according to the six-phase PWM signal output from the motor contr...

Embodiment 2

[0178] Hereinafter, Embodiment 2 of the present invention will be described using the drawings.

[0179] In the analog-to-digital conversion unit 110 of the first embodiment, by providing the analog-to-digital conversion prohibition channel setting flag register 1107, it is possible to reduce the number of analog-to-digital converters to a minimum, reduce register resources and reduce the cost of the modulus Conversion means are described. In this second embodiment, an analog-to-digital conversion device that has a configuration different from that of the first embodiment and can minimize the number of analog-to-digital converters and reduce register resources to reduce costs will be described below.

[0180] Figure 10 It is a configuration diagram showing the analog-to-digital conversion unit 210 of the three-parallel resistance sensorless sine wave motor drive control device 100 according to the second embodiment of the present invention. And, yes, with Figure 6 The sam...

Embodiment 3

[0217] Hereinafter, Embodiment 3 of the present invention will be described using the drawings.

[0218] In the A / D conversion unit 210 having one A / D converter in Embodiment 2, by providing the A / D conversion prohibited channel setting flag registers 2107 and 2108 corresponding to the number of trigger signals input to the control unit 2103, it is possible to An analog-to-digital conversion device is described that reduces register resources and thereby reduces cost while reducing the number of analog-to-digital converters to a minimum. In this third embodiment, an analog-to-digital conversion device that has a configuration different from that of the second embodiment and can minimize the number of analog-to-digital converters and reduce register resources to reduce costs will be described below.

[0219] Figure 13 It is a configuration diagram showing the analog-to-digital conversion unit 310 of the three-parallel resistance sensorless sine wave motor drive control device...

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Abstract

An A / D conversion apparatus performs motor current detection in an A / D conversion period corresponding to two phases out of three phases of a sinusoidal drive motor, using reduced register resources while minimizing the number of A / D converters. The A / D conversion apparatus includes: a selection unit selecting one of a plurality of input channels; an A / D converter converting an analog signal fromthe selected input channel to a digital signal; a start register holding a start channel number of sequential conversion; an end register holding an end channel number of the sequential conversion; aprohibition information holding unit holding prohibition information indicating an input channel to be excluded from the sequential conversion; and a control unit causing the selection unit to select, in channel number order, input channels corresponding to channel numbers from the start channel number to the end channel number except the input channel indicated by the prohibition information.

Description

technical field [0001] The invention relates to an analog-to-digital conversion device, in particular to an analog-to-digital conversion device with multiple channels and continuous conversion functions. Background technique [0002] With the development of inverter control technology in recent years, various methods have been proposed as motor drive control methods. [0003] Conventionally, in position sensorless control when driving a sine wave motor, it is generally known to omit a position sensor for detecting the rotor position of the motor by providing a motor current sensor. The position sensorless control method calculates the voltage drop in the motor based on the applied voltage of the motor, the motor current detected by the motor current sensor, and the motor constant, and infers the counter voltage. The rotor position is inferred from the inferred back voltage information, thereby driving and controlling the motor. [0004] Furthermore, since a motor current s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M1/12H02P6/06H02P6/08H02P6/16H02P6/18H02P6/182H02P6/28
CPCH02P6/18
Inventor 杉原裕司菊江寿小原胜
Owner PANASONIC SEMICON SOLUTIONS CO LTD