FIELD: mechanical engineering; load-handling equipment.
SUBSTANCE: invention relates to electric drives of load-lifting/lowering mechanisms of load-lifting machines. Proposed device contains dc motor, thyristor rectifier, diode, shunting contactor, dynamic braking contactors and resistors. Thyristor rectifier is placed in electric motor supply circuit and is connected with generator. Diode is connected with thyristor rectifier. Lead of diode is connected to motor armature circuit. Shunting contactor shunts diode. Dynamic braking contactors with resistors placed in their circuits are connected with thyristor rectifier and dc motor.
EFFECT: improved reliability of operation of crane electric drive.
5 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| ELECTRIC DRIVE OF CRANE LOAD LIFTING AND LOWERING MECHANISM | 2005 |
|
RU2298520C2 |
| ELECTRIC DRIVE OF LOAD-LIFTING CRANE SLEWING MECHANISM | 2005 |
|
RU2298519C2 |
| CRANE ELECTRIC DRIVE OF CARGO HOISTING MECHANISM | 2007 |
|
RU2345945C1 |
| APPARATUS FOR CONTROLLING LOAD-LIFTING MECHANISM | 0 |
|
SU1384538A1 |
| DEVICE TO CONTROL HORIZONTAL MOTION MECHANISM DRIVE OF MATERIALS HANDLING MACHINE | 0 |
|
SU1805093A1 |
| CONTROL DEVICE FOR MECHANISM OF HORIZONTAL TRANSFERRING OF HOISTING-TRANSPORTATION UNIT | 0 |
|
SU1344712A1 |
| CONTROL DEVICE OF PULSE SWITCHING UNIT | 2002 |
|
RU2249297C2 |
| WINCH CONTROL APPARATUS | 0 |
|
SU981196A1 |
| ELECTRIC DRIVE FOR WEIGHT-LIFTING MECHANISM | 0 |
|
SU860246A1 |
| ELECTRIC MOTOR SWITCH-MODE REGULATION | 2002 |
|
RU2249296C2 |
