Patent ID: 9093930
Filing Date: 2015-07-28
Classification: A47B,A61G,H02P

Abstract:
1. A height-adjustable table comprising: a linear actuator, wherein the linear actuator comprises wherein the control device is configured to adopt a first mode of operation in which the brushless DC motor is accelerated from a rotational speed below a target rotational speed below a target rotational speed to the target rotational speed, the control device being arranged to deliver the three-phased voltage with increasing frequency in the first mode of operation such that a phase angle of the three-phased voltage is controlled without feedback from the brushless DC motor, wherein the control device is configured to adopt a second mode of operation in which a regulation of the three-phased voltage is carried out as a field-oriented regulation, and wherein the control device is configured to switch from the first mode of operation to the second mode of operation if the target rotational speed is reached.