JPH0488500U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a block diagram of a synchronous generator and brushless excitation device according to this invention, Fig. 2 is a block diagram showing details of Fig. 1, and Fig. 3 is an embodiment in which auxiliary excitation is derived from an AC power source. Fig. 4 is a circuit diagram partially showing a block diagram of another embodiment in which the auxiliary excitation is derived from a DC power source, and Fig. 5 shows the main exciter shown in Fig. 1. 6 is a graph showing the phase-to-phase input voltage of the controlled rectifier bridge shown in FIGS. 3 and 4. FIG. 7 is a graph showing the phase-to-phase input voltage of the controlled rectifier bridge shown in FIGS. FIG. 4 is a graph representing the hosing excitation region and quick-response demagnetization region of the controlled rectifying element bridge; FIG. A schematic diagram showing , Figure 8B is 2
FIG. 9 is a schematic diagram showing an embodiment in which two field windings are wound concentrically, and FIG. 9 is a block diagram showing still another embodiment. 10 is a synchronous generator, 26 is a field winding of the synchronous generator, 32 is an armature winding of the synchronous generator, 12 is an excitation device, 14 is a main exciter, 21 is a second field winding, 2
2 is a field member of the main exciter, 23 is a first field winding,
24 is an armature member of the main exciter, 34 is a pilot exciter, 36 is a permanent magnet field member of the pilot exciter, 38 is an armature winding of the pilot exciter, 4
0 is a first controlled rectifying element bridge, 48 is a diode, 80 is an auxiliary power supply, and 82 is a second controlled rectifying element bridge.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An excitation device for a synchronous rotating electric machine having a stator member supporting an AC armature winding and a rotor member supporting a DC field winding, the armature winding being a main exciter having a stator member supporting a rotor member and a first field winding and a second field winding connected in parallel to each other; and from the armature winding of the main exciter. a rotatable rectifier assembly having an input circuit connected to receive alternating current power and an output circuit connected to convey direct current excitation through a direct current field winding of the synchronous rotating electric machine; and supporting an armature winding. a pilot exciter machine having a stator member and a permanent magnet rotor member; a rotor member of the synchronous rotating electric machine, the rectifier assembly, a rotor member of the main exciter machine, and a permanent magnet rotor member of the pilot exciter machine; means for mechanically connecting an input circuit operable to convert alternating current to direct current and connected to receive power from an armature winding of said pilot exciter and a first field winding of said main exciter; means having an output circuit connected to supply a direct current to the line; an input circuit connected to receive power from an auxiliary power supply; and means having a direct current excitation applied to a second field winding of the main exciter. An excitation device for a synchronous rotating electrical machine, comprising: means for deriving the direct current excitation from the auxiliary power source, the device having an output circuit connected in a supplementary manner. 2 Utility model registration claim 1, further comprising means for preventing current reversal by being electrically connected between the output circuit of the converting means and the first field winding of the main exciter Excitation device for synchronous rotating electric machines. 3. Each of the converting means and the direct current excitation deriving means includes a plurality of controlled rectifying elements electrically connected to the bridge arrangement, the controlled rectifying elements being connected in positive polarity relation with respect to the output circuit of said bridge so as to An excitation device for a synchronous rotating electrical machine according to claim 1, which causes a positive current to flow from a compatible power source to a field winding for a main exciter. 4. Means for deriving a first control signal proportional to the main exciter field excitation and also proportional to the power output of the synchronous rotating electrical machine, said first control signal being applied to the converting means in operation; controlling the ignition of the control rectifying element of the converting means in response to one control signal, and further deriving a second control signal corresponding to a predetermined function of the power output of the synchronous rotating electric machine and the field excitation of the main exciter machine. the output of said latter means being connected in operation to said deriving means to control the firing of a control rectifying element of said deriving means in response to said second control signal. An excitation device for a synchronous rotating electrical machine according to scope 3. 5. The excitation device for a synchronous rotating electric machine according to claim 2, wherein the means for preventing current reversal is a connecting diode. 6. The excitation device for a synchronous rotating electric machine according to claim 1, wherein the first field winding and the second field winding are wound around a common iron core.