Linear motor device and method for controlling linear motor device

摘要

A linear motor device includes a linear motor and a control unit configured to apply a load to a pressurizing object by causing a movable part of the linear motor to move. After causing the movable part to move toward the pressurizing object at a predetermined first speed based on position control, the control unit controls the movable part to move by performing deceleration to a second speed which is slower than the first speed and at which the pressure applied to the pressurizing object is less than or equal to a predetermined pressure when the movable part starts to apply the pressure to the pressurizing object, and the control unit causes the movable part to move until the current flowing through the linear motor is greater than or equal to a predetermined current limit value.

主权项

1. A linear motor device comprising:
a linear motor, and a control unit configured to apply a pressure to a pressurizing object by causing a movable part of the linear motor to move, wherein, the control unit, after causing the movable part to move toward the pressurizing object at a predetermined first speed based on position control, controls the movable part to move by performing deceleration to a second speed which is slower than the first speed and at which the pressure applied to the pressurizing object is less than or equal to a predetermined pressure when the movable part starts to apply the pressure to the pressurizing object, the control unit causes the movable part to move at the second speed until a current flowing through the linear motor is greater than or equal to a predetermined current limit value, and wherein the control unit comprises:
a speed switching position determination unit configured to calculate a deceleration start position which is a position at which a speed at which the movable part moves starts to decrease from the first speed to the second speed based on a distance required when the speed at which the movable part moves decreases from the first speed to the second speed and a position at which the pressure starts to be applied to the pressurizing object; anda movement control unit configured to cause the movable part of the linear motor to move at the first speed when causing the movable part to move from a predetermined position to the pressurizing object, and to cause the movable part to move at the second speed until the current flowing through the linear motor is greater than or equal to the current limit value when the movable part reaches the deceleration start position.