CN201608627U

CN201608627U - Universal frequency converter

Info

Publication number: CN201608627U
Application number: CN2009202853126U
Authority: CN
Inventors: 袁爱进; 刘华胜; 柏竣城; 马龙
Original assignee: Sany Heavy Machinery Ltd
Current assignee: Shanghai Huaxing Digital Technology Co Ltd
Priority date: 2009-12-17
Filing date: 2009-12-17
Publication date: 2010-10-13
Anticipated expiration: 2019-12-17

Abstract

The utility model discloses a universal frequency converter, which comprises a shell. The shell is internally provided with a radiator, a driving board and a control board. The shell is provided with radiating holes and connecting holes. The universal frequency converter is characterized in that the driving board is of a split structure; two upper and lower sub driving boards are laminated to form the driving board; a plurality of connector posts are arranged between the upper sub driving board and the lower sub driving board; and the connector posts are conductive copper pillars. The two upper and lower sub driving boards are laminated to form the driving board and composing circuits are respectively arranged on the two sub driving boards and are communicated by the connector posts between the two sub driving boards, thus, the universal frequency converter disperses distribution of the circuits, reduces concentration, effectively improves heat dissipating capability of the frequency converter and prolongs the service life. Meanwhile, a modular interface is formed on each sub driving board so as to be convenient for assembly and disassembly of a power wire.

Description

A kind of universal frequency converter

Technical field

The utility model relates to a kind of electronic device, is specifically related to a kind of universal frequency converter, is mainly used in the AC induction motor speed governing.

Background technology

Frequency converter is the AC power that power frequency supply (50Hz or 60Hz) is transformed into various frequencies, equipment with the variable-speed operation of realizing motor, wherein control circuit is finished the control to main circuit, rectification circuit is transformed into direct current with alternating current, direct-flow intermediate circuit carries out smothing filtering to the output of rectification circuit, and inverter circuit becomes direct current another mistake into alternating current.For frequency converter, also need CPU and some a corresponding circuit that carries out torque calculation sometimes as a large amount of computings of this needs of vector-control frequency converter.Frequency converter is the AC power that can carry out frequency modulation and voltage modulation, can drive multiple motors simultaneously by a frequency converter, thereby the investment of the equipment of saving, frequency converter is by behind the power supply of AC-DC-interchange, drive asynchronous machine, so utilize the power factor of frequency converter drive motor higher, and be not subjected to the motor power (output) factor affecting.According to purpose classification, frequency converter can be divided into universal frequency converter, high-performance special converter, high frequency frequency converter, single-phase frequency converter and three phase converter etc.

Universal frequency converter is mainly by housing at present, be arranged at the compositions such as radiator, drive plate and control board in the housing, housing is provided with louvre and radiator, be used to bear the heat radiation work of frequency converter, one side of housing offers wiring hole, during use, power supply is connected by the interior power-line terminal of this wiring hole place and frequency converter.Yet, because each electronic component all concentrates on the drive plate, especially is distributed with the big dc bus filter capacitor of a plurality of caloric values on the plate, element is comparatively concentrated, cause the diffusing effect of heat relatively poor, directly influence the serviceability of frequency converter and the useful life of components and parts; In addition, power-line terminal all is encapsulated in enclosure interior, must remove integral housing during use, just can finish the connection of power line, makes troubles to operation.

Summary of the invention

The utility model purpose provides a kind of universal frequency converter, by the improvement of structure, effectively improves the integral heat sink performance, prolongs components and parts useful life.

For achieving the above object, the technical solution adopted in the utility model is: a kind of universal frequency converter, comprise housing, be provided with radiator, drive plate and control board in the described housing, offer louvre and wiring hole on the housing, described drive plate is made of upper and lower two stacked placements of sub-drive plate for dividing body structure, go up sub-drive plate and be provided with the complex root binding post between the sub-drive plate down, described binding post is a conduction copper column.

In the technique scheme, the corresponding described wiring hole of described upper and lower drive plate place is provided with a line bank interface respectively, and extend to the outside of housing, described going up is distributed as the dc bus filter capacitor and absorbs circuit part on the sub-drive plate, the corresponding described line bank interface of on the sub-drive plate is the three-phase input interface module, and corresponding described line bank interface is the three-phase output interface module on the following sub-drive plate.

Above, frequency converter generally includes control board and drive plate, mainly be provided with control loops such as digital signal processor and demonstration input panel circuit on the control board, belong to the light current parts, and drive plate is provided with rectification circuit, filter circuit, inverter circuit, power supply output, switching power circuit and current sensor etc., in the technique scheme, described drive plate is by last, two circuit boards of sub-drive plate are formed down, the strong power part that caloric value is big is divided into two parts, be arranged at respectively, on the following two boards, to reduce concentrating of circuit, be beneficial to scattering of heat, be electrically connected by binding post between the two, binding post both had been a support column herein, also be the circuit joint pin, a post is dual-purpose.Especially can and absorb circuit part (filter circuit part) with the dc bus filter capacitor is arranged on the sub-drive plate, other parts are arranged in down on the sub-drive plate, with the dc bus filter capacitor and absorb circuit part and other circuit branches are arranged, be because this partial circuit wiring is comparatively simple, can guarantee that the big dc-link capacitance of caloric value is fully dispelled the heat, simultaneously, there is the space between the two straton drive plates, can be down sub-drive plate heat-dissipating space is provided, solve the problem of frequency converter heat radiation difficulty, effectively increase the service life.In addition, because drive plate is divided into upper and lower sub-drive plate two parts, input and output line bank interface is set on the respective panels, carry out and being connected of external device with the form of module interface, and the wiring socket is extended to the outside of housing wiring hole, can make things convenient for greatly externally and the mounting or dismounting of power line.

Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:

1, since the utility model drive plate by double-deck stacked the constituting of upper and lower sub-drive plate, two interlayers are electrically connected by binding post, and realize the support of two interlayers, the circuit that is arranged on the former drive plate is divided into two parts, is arranged in respectively on the upper and lower sub-drive plate, the density that distributed circuit distributes, reduce concentrating of thermal source, and can utilize the space of two interlayers to dispel the heat, and solve the problem of frequency converter heat radiation, prolong the useful life of components and parts;

2, the big and simple dc bus filter capacitor and absorb circuit part and be arranged on the sub-drive plate of connecting up with caloric value, other circuit are distributed in down on the sub-drive plate, guarantee that dc-link capacitance has good heat radiation;

3, upward on the sub-drive plate three-way power supply input wires socket interface is set, on the sub-drive plate three-phase output connection socket interface is set down, be connected with external device with modular interface, and interface extended to the housing wiring hole outside, need not to open integral housing, the mounting or dismounting of being convenient to operating personnel's equipment room connect, and are simple to operate.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment one;

Fig. 2 is the end view of Fig. 1;

Fig. 3 is the partial schematic sectional view after Fig. 1 removes cover, housing and interface.

Wherein: 1, housing; 2, wiring hole; 3, line bank interface; 4, louvre; 5, radiator; 6, following sub-drive plate; 7, go up sub-drive plate; 8, binding post; 9, control board.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described:

Embodiment one: referring to shown in Fig. 1 to 3, a kind of universal frequency converter, comprise housing 1, be provided with radiator 5, drive plate and control board 9 in the described housing 1, housing 1 forward and backward both sides offer louvre 4, and the bottom side offers wiring hole 2, described drive plate is for dividing body structure, be made of upper and lower two stacked placements of sub-drive plate, go up sub-drive plate 7 and be provided with 6 binding posts 8 between the sub-drive plate 6 down, described binding post 8 is a conduction copper column.

As Fig. 2, shown in 3, on, wiring hole 2 places on the housing 1 of following drive plate correspondence left side are provided with a line bank interface 3 respectively, and extend to the outside of housing 1, described going up is distributed as the dc bus filter capacitor and absorbs circuit part on the sub-drive plate 7, the corresponding described line bank interface of on the sub-drive plate 73 is the three-phase input interface module, and be distributed with on the sub-drive plate 6 down except that the dc bus filter capacitor and absorb circuit the circuit part, as inverter circuit, circuit such as power supply output, the described line bank interface 3 on the corresponding sub-drive plate 6 down is the three-phase output interface module.

With the stacked placement of sub-drive plate, wherein, one is designed to dc bus filtering and absorbs circuit part, and shared of this partition capacitance is bigger, and wiring is comparatively simple; Other parts are arranged on the other sub-drive plate, connect with fixing by dc bus and three-way power supply lead-in clamp between the two sub-drive plates.Guarantee the abundant heat radiation of dc-link capacitance like this, in addition, the three-phase input and the frequency converter three-phase of power supply have been exported the form of making module interface, convenient mounting or dismounting, interface all is emerging in housing 1 outside simultaneously, does not need during use integral housing 1 is taken apart, and is simple to operate.

Claims

1. universal frequency converter, comprise housing, be provided with radiator, drive plate and control board in the described housing, offer louvre and wiring hole on the housing, it is characterized in that: described drive plate is for dividing body structure, be made of upper and lower two stacked placements of sub-drive plate, go up sub-drive plate and be provided with the complex root binding post between the sub-drive plate down, described binding post is a conduction copper column.

2. universal frequency converter according to claim 1, it is characterized in that: the corresponding described wiring hole of described upper and lower drive plate place is provided with a line bank interface respectively, and extend to the outside of housing, described going up is distributed as the dc bus filter capacitor and absorbs circuit part on the sub-drive plate, the corresponding described line bank interface of on the sub-drive plate is the three-phase input interface module, and corresponding described line bank interface is the three-phase output interface module on the following sub-drive plate.