JP2010142049A5

JP2010142049A5 -

Info

Publication number: JP2010142049A5
Application number: JP2008317209A
Authority: JP
Filing date: 2008-12-12
Publication date: 2011-12-15
Anticipated expiration: 2028-12-12

Description

また、本発明による多軸モータドライブシステムは、夫々サーボモータを駆動する複数のサーボアンプと、交流を直流に変換し、複数のサーボアンプに直流を同時に供給する共通コンバータと、複数のサーボアンプの過負荷状態を判定し、過負荷状態であることを判定すると、複数のサーボアンプの動作を停止させる共通コンバータの過負荷保護装置とを備えたことを特徴とする。 Moreover, multi-axis motor drive system according to the invention, a plurality of servo amplifiers for driving the respective servomotors, converts alternating current into direct current, and a common converter supplies direct current to a plurality of servo amplifiers simultaneously, a plurality of servo amplifiers And an overload protection device for a common converter that stops the operation of a plurality of servo amplifiers when the overload state is determined.

Claims

In a method for overload protection of a common converter of a multi-axis motor drive system in which alternating current is converted into direct current by a common converter and supplied to a plurality of servo amplifiers, and a servo motor is driven for each of the plurality of servo amplifiers.
Obtain the current consumption for each of the plurality of servo amplifiers, find the total current consumption by adding these current consumptions,
Based on the total current consumption, an overload determination value is obtained by a timed calculation, and the overload determination value is compared with a preset threshold value according to the capacity of the common converter. Determine if it is in a state,
An overload protection method for a common converter comprising: stopping the operations of all of the plurality of servo amplifiers when it is determined that the common converter is in an overload state.

In a method for overload protection of a common converter of a multi-axis motor drive system in which alternating current is converted into direct current by a common converter and supplied to a plurality of servo amplifiers, and a servo motor is driven for each of the plurality of servo amplifiers.
Obtain a current consumption value for each of the plurality of servo amplifiers, add the plurality of current consumption values to obtain a total current consumption value,
Based on the total current consumption value, an overload determination value is obtained by timed calculation, and the overload determination value is compared with a preset threshold value corresponding to the capacity of the common converter. Determine whether it is under load,
When it is determined that the common converter is in an overload state, when there is a servo amplifier that can reduce the output by a predetermined amount among the plurality of servo amplifiers, the output of the servo amplifier is reduced by the predetermined amount, and output An overload protection method for a common converter, comprising: stopping operation of all of the plurality of servo amplifiers when there is no servo amplifier capable of reducing the predetermined amount.

In claim 1 or 2,
An overload protection method for a common converter, wherein the current consumption is obtained from a torque value of the servo motor, a speed detection of the servo motor, and a DC voltage detection value of a DC supplied from the common converter to the servo amplifier. .

In claim 1, 2 or 3,
An overload protection method for a common converter, wherein the overload determination value is obtained by setting the total consumption current value to zero when the total consumption current value obtained by adding a plurality of consumption current values is a negative value.

In claim 4,
The overload determination value is a value obtained by converting the total consumption current value into a complementary value corresponding to the rising temperature or falling temperature of the common converter, and adding or subtracting the complementary value to the previously determined overload determination value. An overload protection method for a common converter, characterized in that:

In an overload protection device for a common converter of a multi-axis motor drive system that converts alternating current to direct current with a single common converter and supplies it to a plurality of servo amplifiers, and drives a servo motor for each of the plurality of servo amplifiers.
A plurality of first arithmetic units for obtaining current consumption for each of the plurality of servo amplifiers;
Second computing means for adding up the consumption currents of the plurality of servo amplifiers obtained by the plurality of first computation units to obtain a total consumption current;
Based on the total current consumption, an overload determination value is obtained by timed calculation, the overload determination value is compared with a preset threshold value according to the capacity of the common converter, and the common converter is overloaded. A third calculating means for determining whether or not there is;
And a means for stopping the operation of all of the plurality of servo amplifiers by determining that the third arithmetic means is in an overload state. Protective device.

In an overload protection device for a common converter of a multi-axis motor drive system that converts alternating current to direct current with a single common converter and supplies it to a plurality of servo amplifiers, and drives a servo motor for each of the plurality of servo amplifiers.
A plurality of first arithmetic units for obtaining current consumption for each of the plurality of servo amplifiers;
Second computing means for adding up the consumption currents of the plurality of servo amplifiers obtained by the plurality of first computation units to obtain a total consumption current;
Based on the total current consumption, an overload determination value is obtained by timed calculation, the overload determination value is compared with a preset threshold value according to the capacity of the common converter, and the common converter is overloaded. A third calculating means for determining whether or not there is;
When there is a servo amplifier whose output can be reduced by a predetermined amount among the plurality of servo amplifiers by the third calculation means determining that the common converter is in an overload state, Overload protection for a common converter, comprising means for stopping the operation of all of the plurality of servo amplifiers when there is no servo amplifier capable of reducing the output by the predetermined amount and reducing the output by the predetermined amount. apparatus.

In claim 6 or 7,
The first means obtains the consumption current from a torque value of the servo motor, speed detection of the servo motor, and a DC voltage detection value of a DC supplied from the common converter to the servo amplifier. Overload protection device for common converter.

In claim 6, 7 or 8,
The third calculating means obtains the overload determination value by setting the total consumption current value to zero when the total consumption current value obtained by the second calculation means is negative. Converter overload protection device.

In claim 9,
The third means converts the total current consumption value into a complementary value corresponding to the rising temperature or falling temperature of the common converter, and adds or subtracts the complementary value to the previously determined overload determination value. An overload protection device for a common converter characterized by obtaining an overload judgment value.

A plurality of servo amplifiers each driving a servo motor;
Converting alternating current into direct current, and a common converter supplies direct current simultaneously to a plurality of the servo amplifiers,
An overload protection device for the common converter that determines an overload state of the plurality of servo amplifiers and stops the operation of the plurality of servo amplifiers when it is determined that the servo amplifier is in an overload state. Multi-axis motor drive system.