Elevator

An elevator comprising:

• an elevator motor;
• a motor drive for the elevator motor having a frequency converter comprising a rectifier bridge, an inverter bridge and a DC link in between, the frequency converter being controlled via a controller, the rectifier bridge being connected to AC mains via three feed lines comprising chokes, and the rectifier bridge being realized via controllable semiconductor switches;
• a contactor located between the feed lines and AC mains;
• a backup power supply at least for emergency drive operation;
• an emergency control associated with the motor drive, the emergency control configured to perform an automatic emergency drive, wherein the emergency control is connected to a manual drive circuit having a manual drive switch for a manual rescue drive;
• and
• a motion sensor connected to the emergency control,
• wherein the emergency control is configured to activate a brake and/or gripping device of the elevator in case the detected car speed exceeds a predetermined threshold value,
• wherein the controller and/or the emergency control comprises an auxiliary power input being connectable to the backup power supply, and
• wherein a second DC/DC converter is located in the auxiliary power input.

An elevator comprising:

• an elevator motor;
• a motor drive for the elevator motor having a frequency converter comprising a rectifier bridge, an inverter bridge and a DC link in between, the frequency converter being controlled via a controller, the rectifier bridge being connected to AC mains via three feed lines comprising chokes, and the rectifier bridge being realized via controllable semiconductor switches;
• a contactor located between the feed lines and AC mains;
• a backup power supply at least for emergency drive operation;
• an emergency control associated with the motor drive, the emergency control configured to perform an automatic emergency drive, wherein the emergency control is connected to a manual drive circuit having a manual drive switch for a manual rescue drive;
• and
• a motion sensor connected to the emergency control,
• wherein the emergency control is configured to activate a brake and/or gripping device of the elevator in case the detected car speed exceeds a predetermined threshold value,
• wherein the controller and/or the emergency control comprises an auxiliary power input being connectable to the backup power supply, and
• wherein an activation circuit is provided between the backup power supply and the auxiliary power input, in which activation circuit a third switch is provided which is controlled via the emergency control and via the manual drive circuit.