PJS2880 main motor to change VVVF speed control

PJS2880 rotary machine uses thyristor to trigger DC motor speed-adjusting DC motor speed control system, often due to aging electrical components and resistive heating resistance changes and other reasons, causing instability and instability can not boot. DC motors also wear due to carbon brushes and rectifiers, causing problems. The motor is bulky, has high energy consumption and low efficiency. In order to ensure safe production, reduce energy consumption, and improve efficiency, we have reconstructed the main drive circuit of the PJS2880 rotary press and adopted the VVVF speed control system to achieve satisfactory results.

The main motor adopts Y2200-4 type three-phase 380V 30KW AC motor produced by Anhui Yinan Electric Machinery Factory. The mounting hole spacing size of the base is A=318 B=305 C=120 aperture 19, the motor center height H=200 shaft diameter d= 55 axis key W=16

Pulley aperture diameter from the original 48 car processing to diameter 55, hole key W = 12 warp cutting to W = 16, motor adjustment base by C = 120 positioning, according to A = 318 B = 305 line, proofing punch, drill 14 Bottom hole, attack the thread of M16.

The cycloidal speed reducer in the original low speed section is retained, and the base is reduced by 50 mm after reforming, keeping the center height equal to the height of the motor center, as shown in Figure 1.

Remove the DC thyristor speed control system in the main motor drive control cabinet, keep the XPl aviation plug and connection terminal, keep the R, S, T, and PE wires, install the drill hole in the cabinet and tap the M5 threaded hole to install the DZl00H air circuit breaker Device.

Adopting the frequency inverter F1000-G0300T3C type, 3PH 30KW produced by Huifeng Electronics Co., Ltd., the installation hole distance A=274, B=420

XPl air outlet terminal wire number is as follows

720 WT38 705 WT37 771B D36 771+D108 535 75 95 D107

Huifeng inverter 3.7 ~ 400KW control terminal schematic

OUTl OUT2 +12V CM OPl OP2 0P3 0P4 0P5 0P6 0P7 OP8 V1 V2 V3 I2 FM IM TA TB TC

In order to maintain the integrity of the circuit diagram, as far as possible use the original line terminal number wiring, take WT38, WT37, D36 line speed control voltage control terminal Vl, V2, V3, 771B line and Dl07 line connection FM, V3 external speed table V Lines 7718 and 781-are connected. The original speedometer is a 50V voltmeter. It is now changed to a 44C2 type O-10V voltmeter. After the original surface modification of the dial face, the print speed value can be correctly displayed.

The 702 and 705 lines are connected to the brake electromagnetic clutch, and the 701 is connected to the KAl bell. The AC contactor normally closes the upper end of the contact and the lower end connects to the 705 line. Remove the three power supply cables from FR1 and Wl, V1, and U1, and the #0 cable from #2.

KA2 is originally a low-speed motor AC contactor, remove the main contacts of the three-phase power into the line and outlet, the Dl08 line connected to the top of the main contact, the lower end of the Dl07 line, for the inverter CM control power supply. Dl08 line is connected to inverter 0P6 forward command terminal, and 95 line is connected to CM terminal.

The 535 line is connected to the KM2 reverse point AC contactor main contact upper end, and the lower end is connected to the CM terminal. The 75 line is connected to the positive point AC contactor KMl upper end of the main contact, the lower end is connected to the CM terminal, and the 75 line is connected to the inverter 0Pl inching terminal.

After the above transformation, the energy consumption is reduced, and the reliability of equipment operation and production efficiency are improved.