CN2418616Y

CN2418616Y - Low-frequency power-supply of ac. lifting machine for mine use

Info

Publication number: CN2418616Y
Application number: CN 00203117
Authority: CN
Inventors: 孙明; 赵禧林; 张福贵; 赵辉; 姜秋生
Original assignee: JIAOZUO HUAFEI ELECTRONIC APPLIANCE CO Ltd
Current assignee: JIAOZUO HUAFEI ELECTRONIC APPLIANCE CO Ltd
Priority date: 2000-01-31
Filing date: 2000-01-31
Publication date: 2001-02-07
Anticipated expiration: 2010-01-31

Abstract

The utility model discloses a low-frequency power supply of an ac. lifting machine for mine use, which comprises a current output meter, a voltage input meter, a voltage output meter, a key regulating window, a main control triggering circuit board, a controlled silicon component, an air switch and a housing. A Hall current sensor is sheathed on each phase line of a current output end, the signal output ends of the Hall current sensors are added on the main control triggering circuit board, and then the utility model realizes no-circulating current transformation. The utility model has the characteristics of simple structure, reliable work, small size, etc.

Description

Mining ac elevator low-frequency power

The utility model relates to a kind of mining ac elevator low-frequency power, especially in mining ac elevator electric-control system, as the power supply that drags of main motor braking section low-frequency brake and the section of creeping low cruise.

At present, the employed low-frequency power of mining ac elevator mainly contains following two kinds, first kind is the low-frequency power of being produced by Tianjin electric drive research institute, its major loop is a full-bridge type, needs the transformer isolation three phase mains, and volume is very big, the triggering loop is an analog form, debug difficulties, the long-term use, parameter is drifted about easily.Second kind is the low-frequency power of being produced by Yantai company of Dongfang Electronics, its major loop is that semibridge system does not have the circulation working method, circuits for triggering adopt 16 single-chip microcomputers of multi-disc, acyclic current control is to adopt the voltage system that detects output to finish, and each controllable silicon is that individual devices connects, assembles by outer conductor, complex structure, poor reliability, volume is bigger.

It is simple that the purpose of this utility model provides a kind of line, reliable operation, the mining elevator low-frequency power that volume is less.

To achieve these goals, the utility model comprises: output current table, input voltage table, output voltage meter, button are regulated window, master control circuits for triggering plate, silicon controlled component, air switch, shell.Be with a Hall current instrument transformer on each phase line of current output terminal, the Hall current sensor output signal end is added on the master control borad circuits for triggering.Like this, the feedback control signal of the no circulation of control is directly produced by output end current, thereby work is more reliable.

For the storing that reduces silicon controlled component takes up space, reduce line, all controllable silicons are concentrated be pressed in three heat sink assemblies, form an integral body.

Below in conjunction with accompanying drawing the utility model is described in detail.

Fig. 1 is an internal structure schematic diagram of the present utility model.

Fig. 2 is an external structure schematic diagram of the present utility model.

Fig. 3 is the structural profile schematic diagram of silicon controlled component.

Fig. 4 is the utility model electrical principle schematic diagram.

As seen from Figure 1, Figure 2, the utility model is made of output current table 1, input voltage table 2, button adjusting window 3, output voltage meter 4, master control circuits for triggering plate 5, silicon controlled component 6, air switch 7, shell 8, control main board 9.Output current table 1, input voltage table 2, button are regulated window 3, output voltage meter 4 is fixed on case surface, and master control circuits for triggering plate 5, silicon controlled component 6, air switch 7, control main board 9 are fixed in the housing.

As shown in Figure 3, take up space, reduce line in order to reduce silicon controlled component storing institute, six controllable silicons 11 are concentrated and are pressed in three heat sink assemblies 10, form an integral body, and are reliable in order to guarantee its heat radiation, controllable silicon 11 should be connected reliably with heat sink assembly 10, arranges evenly.

As shown in Figure 4, the three-phase alternating-current supply of 660V is through air switch K, fast acting fuse F ₁After, major loop is added to A, B, the C input of silicon controlled component SCRZJ, and another loop is by synchrotrans B ₁Be added to the synchronous signal input end TBXH of master control borad ZKB after the transformation.The 380V AC power is through isolating transformer B ₂Supplying with the master control borad power supply after the transformation uses, master control borad ZKB is made up of single-chip microcomputer and attached device thereof, on master control borad ZKB, be connected with display circuit board XS and button circuit board EJ, be used to show low-frequency power output services frequency values, with the low-frequency power operating state is set, the operating state of the control signal of external control terminal WKDZ control low-frequency power.Silicon controlled component SCRZJ is under the control of the triggering signal ZFXH of master control borad ZKB, the AC power of 50Hz is transformed into the low-frequency ac power of 2～5Hz, for the circulation that occurs in the reliable control change process, hold on each phase line by U, V, W at current output terminal, be with a Hall current instrument transformer L1, L2, L3 respectively, Hall current instrument transformer output signal end is added to the respective end of master control circuits for triggering, be used to detect the zero crossing of output current, immediately commutation is controlled to unsteady flow, realizes that finally acyclic rheology changes.Voltmeter V1 is used to show input voltage value, voltmeter V2 is used to show output voltage values, and ammeter A is used to show output current value, and is good in order to guarantee the silicon controlled component heat radiation, be provided with three blower fan D1, D2, D3 have been installed, guarantee the silicon controlled component reliably working.

Claims

1, a kind of mining ac elevator low-frequency power, it comprises: output current table (1), input voltage table (2), button is regulated window (3), output voltage meter (4), master control circuits for triggering plate (5), silicon controlled component (6), air switch (7), shell (8), it is characterized in that being with a Hall current instrument transformer on each phase line of current output terminal, Hall current instrument transformer output signal end is added on the master control circuits for triggering plate.

2,, it is characterized in that described silicon controlled component (6) is that all controllable silicons are pressed in three heat sink assemblies (10), forms an integral body according to the described mining ac elevator low-frequency power of claim 1.