摘要:
An electric rotating machine including a rotor (50) having a spider arm (1) which is fixedly mounted on a substantially vertical shaft (11) and has arms (14) extending radially outwardly from the shaft (11), and an annular rotor rim (2) fixedly mounted on distal ends of the arms (14) of the spider arm (1). The laminated core (3) is fixedly mounted on an outer periphery of the rotor rim (2), and is composed of a plurality of fan-shaped thin core plates (31) of steel laminated and arranged in an annular shape. Slot grooves (32) are formed in an outer periphery of the core plates. The rotor rim (2) is composed of laminated rim members (21) each made of an annular thick steel plate, and rim engaging grooves are formed in an outer periphery of the rim member at equal intervals. The core plate has core engaging grooves (33) opposed to the rim engaging grooves (26), respectively, in such a manner that the number of complete core engaging grooves is two. An axially-extending connecting key (8) is fitted in each mating pair of core engaging groove and rim engaging groove to fix the laminated core (3) to the rotor rim (2).
摘要:
There is disclosed a generator-motor apparatus with economical protection measures for use in a variable speed pumping-up electric power plant, which comprises a main transformer (12), a secondary winding of which is coupled to an electric power system (10), a power system breaker (14) connected to a primary winding of the main transformer (12), a synchronizing breaker (16) connected in series with the power system break (14), a generator-motor (18), a rotor of which is mechanically coupled to a pump-turbine and an armature winding of which is connected to the power system (10) through the synchronizing breaker (16), the power system breaker (14) and the main transformer (12), and an excitation circuit, including a frequency converter (34) for supplying a field winding (22) of the generator-motor (18) with AC voltage of the variable frequency and a converter transformer (30) for feeding the converter (34), which is branched from a junction (28) of the power system breaker (14) and the synchronizing breaker (16).
摘要:
A variable-speed power generating system comprises a variable-speed generator (5) electrically connected at its primary winding to an electric power system (1) and at its secondary winding to the electric power system through a frequency converter (9) and mechanically coupled to a driver (6) driving the secondary side thereof, a phase detector (8) generating an output signal representing a slip frequency in response to the application of a first input having a frequency component of an output generated from the primary winding of the variable-speed generator and a second input having a frequency component corresponding to the rotation speed of the driver, a controller (10) controlling the frequency onverter on the basis of a reference phase provided by the output signal of the phase detector, and regulating means (15, 16;) for controlling the frequency converter so that, when the variable-speed generator is disconnected from the electric power system, the frequency applied to the secondary winding of the variable-speed generator may not deviate from a predetermined allowable range of variable frequency operation of the frequency converter.
摘要:
There is disclosed a generator-motor apparatus with economical protection measures for use in a variable speed pumping-up electric power plant, which comprises a main transformer (12), a secondary winding of which is coupled to an electric power system (10), a power system breaker (14) connected to a primary winding of the main transformer (12), a synchronizing breaker (16) connected in series with the power system break (14), a generator-motor (18), a rotor of which is mechanically coupled to a pump-turbine and an armature winding of which is connected to the power system (10) through the synchronizing breaker (16), the power system breaker (14) and the main transformer (12), and an excitation circuit, including a frequency converter (34) for supplying a field winding (22) of the generator-motor (18) with AC voltage of the variable frequency and a converter transformer (30) for feeding the converter (34), which is branched from a junction (28) of the power system breaker (14) and the synchronizing breaker (16).
摘要:
An electric rotating machine including a rotor (50) having a spider arm (1) which is fixedly mounted on a substantially vertical shaft (11) and has arms (14) extending radially outwardly from the shaft (11), and an annular rotor rim (2) fixedly mounted on distal ends of the arms (14) of the spider arm (1). The laminated core (3) is fixedly mounted on an outer periphery of the rotor rim (2), and is composed of a plurality of fan-shaped thin core plates (31) of steel laminated and arranged in an annular shape. Slot grooves (32) are formed in an outer periphery of the core plates. The rotor rim (2) is composed of laminated rim members (21) each made of an annular thick steel plate, and rim engaging grooves are formed in an outer periphery of the rim member at equal intervals. The core plate has core engaging grooves (33) opposed to the rim engaging grooves (26), respectively, in such a manner that the number of complete core engaging grooves is two. An axially-extending connecting key (8) is fitted in each mating pair of core engaging groove and rim engaging groove to fix the laminated core (3) to the rotor rim (2).
摘要:
A variable-speed power generating system comprises a variable-speed generator (5) electrically connected at its primary winding to an electric power system (1) and at its secondary winding to the electric power system through a frequency converter (9) and mechanically coupled to a driver (6) driving the secondary side thereof, a phase detector (8) generating an output signal representing a slip frequency in response to the application of a first input having a frequency component of an output generated from the primary winding of the variable-speed generator and a second input having a frequency component corresponding to the rotation speed of the driver, a controller (10) controlling the frequency onverter on the basis of a reference phase provided by the output signal of the phase detector, and regulating means (15, 16;) for controlling the frequency converter so that, when the variable-speed generator is disconnected from the electric power system, the frequency applied to the secondary winding of the variable-speed generator may not deviate from a predetermined allowable range of variable frequency operation of the frequency converter.