AC Drives Control Techniques Unidrive SPM

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Frequency converters Control Techniques series Unidrive SPM (Solutions Platform Modular) are built on a modular principle and are designed to create complex control systems for high-power electric drives. The Unidrive SPM modular electric drive is built on the same platform as the Unidrive SP electric drive, has an identical control system, a configuration of digital and analog inputs and outputs, and a set of optional modules.

Using various combinations of power and control modules, the user can implement various specialized power control circuits for the electric drive in the power range from 90 to 1600 kW.

Components of the Unidrive SPM modular electric drive system

SPMC Module - controlled Thyristor rectifier;
SPMU module is an uncontrolled diode rectifier;
The SPMA module is a complete AC electric drive with a rated current of up to 236A with an internal rectifier and throttle on the AC input lines, equipped with DC bus connection terminals for operation in recovery modes and multi-motor modes with a common DC bus;
The SPMD module is an inverter cascade with a rated current of up to 350A, designed to convert direct current into alternating current. For autonomous operation, it is necessary to equip the inverter with an external rectifier (SPMC , SPMU modules), an input reactor. The DC bus connection terminals can be used for operation in recovery mode, in modes with parallel DC buses.
INL module – linear input reactor;
The OTL module is an output network choke.

Advantages of using the Unidrive SPM modular electric drive system

flexibility in the construction of complex electric drive control systems;
minimization of design and design work deadlines;
compact size and easy installation of equipment;
unification of equipment, minimum delivery time for spare parts;
easy maintenance and high maintainability (if necessary, all SPM modules can be removed from the control cabinet, sent for diagnostics or replaced with a new module).

Typical examples of the implementation of effective electric drive control schemes

Parallel connection of up to 10 SPMA/SPMD modules (the master module can simultaneously control up to 9 slave modules);
Multi-axis (multi-drive, multi-motor) control systems with a common DC bus;
Control systems based on four-quadrant electric motor control, providing the exchange and recovery of electrical energy by combining motor and recuperating drives;
6, 12, 18 - pulse control of SPMC rectifiers to reduce harmonic distortion;
Systems with active connection to the power grid, allowing to reduce the harmonic distortion of the power supply current;
Systems based on unmanaged SPMU rectifiers for applications with low-quality power supplies, with long cable connections, for systems in which DC bus charging is performed by other means.

Typical schemes for building systems based on the Unidrive SPM modular electric drive system

SPMA module – easy installation, cost reduction, SPMD module – building complex and flexible systems.

The parallel connection allows you to control electric motors up to 1600 kW.

Building systems for energy recovery in the grid

6, 12, 18-pulse circuits to reduce harmonics

Reduction of energy consumption by combining DC buses in generator and motor modes

Nominal parameters of SPMA drives in heavy duty at a supply voltage of 380V – 480V ± 10%

Model	Pn, kW	Imax, And	Iol, And	Icl, But	The rectifier	The reactor	Throttle
SPMA1401	90	180	232	270	-	-	-
SPMA1402	110	210	271	315	-	-	-

Pn is the rated power, Imax is the maximum continuous output current, Iol is the peak current in the open circuit, Icl is the peak current in the closed circuit.

Nominal parameters of SPMA parallel drives in heavy duty at a supply voltage of 380V – 480V ± 10%

Model	Pn, kW	Imax, And	Iol, And	Icl, But	The rectifier	The reactor	Throttle
2xSPMA1401	185	342	441	513	-	-	OTL411
2xSPMA1402	225	399	515	599	-	-	OTL412

Pn is the rated power, Imax is the maximum continuous output current, Iol is the peak current in the open circuit, Icl is the peak current in the closed circuit.

Nominal parameters of SPMA drives in heavy duty at a supply voltage of 500V – 575V ± 10%

Model	Pn, kW	Imax, And	Iol, And	Icl, But	The rectifier	The reactor	Throttle
SPMA1601	75	100	128	149	-	-	-
SPMA1602	90	125	160	187	-	-	-

Pn is the rated power, Imax is the maximum continuous output current, Iol is the peak current in the open circuit, Icl is the peak current in the closed circuit.

Nominal parameters of SPMA drives in heavy duty at a supply voltage of 500V – 690V ± 10%

Model	Pn, kW	Imax, And	Iol, And	Icl, But	The rectifier	The reactor	Throttle
SPMA1601	90	100	128	149	-	-	-
SPMA1602	110	125	160	187	-	-	-

Pn is the rated power, Imax is the maximum continuous output current, Iol is the peak current in the open circuit, Icl is the peak current in the closed circuit.

Nominal parameters of SPMD drives in heavy duty at a supply voltage of 380V – 480V ± 10%

Model	Pn, kW	Imax, And	Iol, And	Icl, But	The rectifier	The reactor	Throttle
SPMD1401	90	180	232	270	SPMC1401	INL401	-
SPMD1402	110	210	271	315	SPMC1402	-
SPMD1403	132	246	310	359	INL402	-
SPMD1404	160	290	374	435	-

Pn is the rated power, Imax is the maximum continuous output current, Iol is the peak current in the open circuit, Icl is the peak current in the closed circuit.

Nominal parameters of SPMD parallel drives in heavy duty at a supply voltage of 380V – 480V ± 10%

Model	Pn, kW	Imax, And	Iol, And	Icl, But	The rectifier	The reactor	Throttle
2xSPMD1401	185	342	441	513	SPMC2402	INL411	OTL411
2xSPMD1402	225	399	515	599	SPMC2402	INL411	OTL412
2xSPMD1403	280	470	588	682	SPMC2402	INL412	OTL413
2xSPMD1404	315	551	711	827	SPMC2402	INL412	OTL414
3xSPMD1402	315	599	772	898	1xSPMC2402 1xSPMC1402	1xINL411 1xINL401	3xOTL402
4xSPMD1401	355	684	882	1026	2xSPMC2402	2xINL411	4xOTL401
3xSPMD1403	400	701	876	1017	1xSPMC2402 1xSPMC1402	1xINL412 1xINL402	3xOTL403
4xSPMD1402	450	798	1029	1197	2xSPMC2402	2xINL411	4xOTL402
3xSPMD1404	450	827	1066	1240	1xSPMC2402 1xSPMC1402	1xINL412 1xINL402	3xOTL404
4xSPMD1403	550	935	1169	1355	2xSPMC2402	2xINL412	4xOTL403
4xSPMD1404	630	1102	1422	1653	2xSPMC2402	2xINL412	4xOTL404

Pn is the rated power, Imax is the maximum continuous output current, Iol is the peak current in the open circuit, Icl is the peak current in the closed circuit.

Nominal parameters of SPMD drives in normal operation at a supply voltage of 500V – 690V ± 10%

Model	Pn, kW	Imax, And	Iol, And	Icl, But	The rectifier	The reactor	Throttle
SPMD1601	110	125	137	137	SPMC1601 /SPMU1601	-	-
SPMD1602	132	144	158	158	-	-
SPMD1603	160	168	184	184	-	-
SPMD1604	185	192	211	211	-	-

Pn is the rated power, Imax is the maximum continuous output current, Iol is the peak current in the open circuit, Icl is the peak current in the closed circuit.

Nominal parameters of the rectifiers SPMC, SPMU in normal mode at a supply voltage of 380V – 480V ± 10%

Model	Iin, A	Imax, And	Iout, And	Model	Iin, A	Imax, And	Iout, And
SPMC1401	207	210	222	SPMU1401	207	210	222
SPMC1402	339	344	379	SPMU1402	339	344	379
SPMC2402	2 x 308	2 x 312	2 x 345	SPMU2402	2 x 308	2 x 312	2 x 345

In is the rated input current, Imax is the maximum input current, Iout is the rectified rated current.

Nominal parameters of the rectifiers SPMC, SPMU in normal mode at a supply voltage of 500V – 690V ± 10%

Model	Iin, A	Imax, And	Iout, And	Model	Iin, A	Imax, And	Iout, And
SPMC1601	192	195	209	SPMU1601	192	195	209

In is the rated input current, Imax is the maximum input current, Iout is the rectified rated current.

If you have any questions about the selection of Unidrive SPM modular AC drives, please contact us by phone +7 (800) 333-47-37.

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