Cold start control of a power tool

A method for a cold start drive control of a speed-controlled electric motor drive unit for driving a power tool, the method comprising the following steps:

• switching on the electric motor drive unit by manually operating an electrical switc;
• detecting an initial temperature inside a power tool housing by at least one temperature sensor;
• comparing the detected initial temperature with a stored temperature limit value by an electronic control unit;
• cold controlling the electric motor drive unit on a minimum desired speed when the initial temperature is below the temperature limit value;
• and
• nominal controlling the electric motor drive unit on a higher desired speed when the initial temperature exceeds the temperature limit value.

A drive arrangement for a cold start drive control of a speed-controlled electric motor drive unit for driving a power tool, the drive arrangement comprising:

• an electrical switch for manually switching on the electric motor drive unit;
• at least one temperature sensor provided to detect an initial temperature inside a power tool housing;
• and
• an electronic control unit configured to compare the detected initial temperature with a stored temperature limit value;
• the control unit providing a cold controlling of the electric motor drive unit on a minimum desired speed when the initial temperature is below a temperature limit value, the control unit providing a nominal controlling of the electric motor drive unit on a higher desired speed when the initial temperature exceeds the temperature limit value.