Avoiding electromagnetic interference (EMI) in electrical equipment and drive systems, e.g. used in radio astronomy

A drive system for sensitive devices used in radio astronomy, the drive system comprising:

• a first motor;
• a first converter configured to supply a first drive power to the first motor;
• a control unit configured to control a rotational speed and/or a rotational position of the first motor;
• a first power supply line for providing the first motor with the first drive power;
• and
• a first signal line for providing the control unit with a signal indicating a measured rotational speed and/or a measured rotational position of the first motor,
• wherein the drive system further comprises a shaft grounding element for grounding a drive shaft of the first motor,
• wherein each one of the first power supply line and the first signal line further comprises a line filter unit being a low-pass filter for filtering electromagnetic interference signals by blocking frequencies higher than 30 MHz, and
• wherein the shaft grounding element comprises a sliding contact element configured to enable electrical contact between the drive shaft of the first motor and the shaft grounding element while the drive shaft of the first motor is moved relative to the sliding contact element.