1. YASKAWA Mechatronics Solutions High Performance Inverter with Advanced Vector Control Varispeed G7

2. YASKAWA Mechatronics Solutions Varispeed G7 Maintain market leader position by introducing something new Global specification – World wide usage Gentle to environment Solution to common 400V class inverter problems Maximum control performance Wide application field User friendly Easily adaptable to users demands Main Design Intentions Main Design Intentions

3. YASKAWA Mechatronics Solutions Varispeed G7 YASKAWA Mechatronics Solutions Varispeed G7 – 3-Level Control Main Features: Reduced surge voltages Reduced bearing corrosion due to low bearing currents Reduced electrical noise Reduced audible noise Reduced leakage currents Worlds First 400V 3-Level Control Inverter Worlds First 400V 3-Level Control Inverter

4. YASKAWA Mechatronics Solutions Varispeed G7 How The 3-Level Method Works: Tr 1 Tr 2 Tr 3 Tr 4 V P N P N Motor + - V P N 2 V PN 2 V PN :DC bus voltage One phase output circuit Input circuit is like on conventional inverters (B6/B12 rectifier) DC bus voltage is split by capacitors and neutral point is stabilized with special circuit Three voltage levels: - Positve voltage (P) - Zero voltage (0) - Negative voltage (N) Result: dv/dt becomes halfed ! 0 P 0 level N V PN 2 Varispeed G7 – 3-Level Control

5. YASKAWA Mechatronics Solutions Varispeed G7 V PN /2 + 0 - V PN + - Circuit V PN UVW P N Phase Voltage Line Voltage Conventional Model [2-level Control] Varispeed G7 [3-level Control] Varispeed G7 – 3-Level Control Comparison:

6. YASKAWA Mechatronics Solutions Varispeed G7 Low Surge Voltages 0 V PN 770V peak 0 V PN 1200V peak Conventional 2-level switching G7 3-level switching Switching the half DC bus voltage reduces surge voltages Motor winding insulation is stressed less Motor lifetime is lengthened No problems with older, bad insulated motors anymore Varispeed G7 – 3-Level Control

7. YASKAWA Mechatronics Solutions Varispeed G7 Low Motor Bearing Currents Low Motor Bearing Currents Shaft Winding Bearing currents Bearing Reduced bearing currents Thus electrolytic corrosion is lowered Bearing lifetime is extended Varispeed G7 – 3-Level Control

8. YASKAWA Mechatronics Solutions Varispeed G7 Low Earth Leakage Currents Earth leakage currents are greatly reduced Effect on earth leakage circuit breakers is minimized No problems with long, shielded motor cables 11A 5A Conventional 2-level switching G7 3-level switching Varispeed G7 – 3-Level Control

9. YASKAWA Mechatronics Solutions Varispeed G7 Excellent Torque Characteristic 0 0.3 1.5 3 10 Operation frequency (Hz) 250 200 150 100 50 Torque (%) Open Loop Vector 2 Closed Loop Vector Output Torque 150% at 0.3Hz150% at 0 Hz Speed control range 1:2001:1000 New flux observer improves torque characteristic Accurate Torque Control Allows precise limiting of output torque Protects machines and materials from damages caused by over torque Motor speed Load torque Torque Ref Varispeed G7 – High Performance

10. YASKAWA Mechatronics Solutions Varispeed G7 Highly Improved Speed Response Very fast response to frequency reference changes: Motor speed 900 min -1 Torque reference 50ms 100% 960 min -1 [Vector control with PG: No load] Motor speed 450 min -1 8 min -1 100% Torque reference Motor current 8A 28A 250ms [Vector control with PG: With load] G5G7 OLV5 Hz10 Hz CLV30 Hz40 Hz Speed change caused by sudden load changes can be leveled out in just a few milliseconds Torque control in open loop vector control mode (formerly with PG only) Varispeed G7 – High Performance

11. YASKAWA Mechatronics Solutions Varispeed G7 New Autotuning Function 1.Rotating autotuning as known from G5 2.Non rotating autotuning for measuring line-to-line resistance 3.Non rotating autotuning for all motor parameters Motor and load have not to be uncoupled Highest performance on every machine type by using Vector control Easier and faster machine startup IM Varispeed G7 – High Performance New Speed Search Function Very soft speed search in both directions Shorter recovery time after momentary power loss (halved in in-house comparison)

12. YASKAWA Mechatronics Solutions Varispeed G7 Varispeed G7 – Easy To Use Full Text Operator 5 lines illuminated LCD display 7 languages Easy menu structure Verify function to detect modified constants Can be used as Copy-Unit RJ45 connector for easy external usage

13. YASKAWA Mechatronics Solutions Varispeed G7 Easy cooling fan replacement Cooling fan operating time monitor as maintenance indicator Fan On/Off control extends cooling fan life time Varispeed G7 – Easy To Use Easy maintenance and inspection Terminal board can be removed easily Fast replacement without removing the control circuit wiring

14. YASKAWA Mechatronics Solutions Varispeed G7 Effect of Energy Savings Efficiency with Energy Saving Control Saving Control Load (%) Motor Efficiency (%) 0 100 50 50 100 Efficiency with Standard Operation(60Hz) Energy Saving Control Achieves highest efficiency for any application Saves energy costs In V/f and Vector control modes Varispeed G7 – Gentle To Environment Harmonics Current Reduction Models up from 18.5kW have included DC choke as standard (optional for smaller units) 12 pulse input with special input transformer for models up from 18.5 kW

15. YASKAWA Mechatronics Solutions Varispeed G7 Global Specification Varispeed G7 – Global Specification Various Power supply 200V class200V to 240V, 3 phase, 50/60 Hz 400V class380V to 480V, 3 phase, 50/60 Hz Power supply voltage tolerance+10 %, -15 % DC power supplypossible via DC bus terminals Global Standards UL and cUL CE Global Field Bus Support MEMOBUS with RS422/485 as standard Device Net Profibus-DP Interbus-S CC-Link CANopen ControlNet LONworks

16. YASKAWA Mechatronics Solutions Varispeed G7 General Features Varispeed G7 – General Features Capacity Range 200V class: 0.4 to 110 kW 400V class: 0.4 to 300 kW DC Reactor 0.4 to 15 kW: optional 18.5 to 300 kW: standard 12-pulse Input 0.4 to 15 kW: not available 18.5 to 300 kW: available ( a 3-winding transformer is needed) Braking Chopper 0.4 to 15kW: included 18.5 to 300kW: optional (external CDBR unit has to be used) Enclosures 0.4 to 15 kW: IP20 (NEMA 1) 18.5 to 300kW: IP00, IP20 (NEMA 1) as option (not for 2090, 2110, 4185, 4220, 4300 units) Digital Inputs Forward Run, Reverse Run, 10 multifunction digital inputs, NPN/PNP selectable Digital Outputs 1 fault contact (changeover contact), 2 multifunction open collector outputs, 3 multifunction contactor outputs Analogue Inputs 1 frequency reference input (-10 to +10V), 2 multifunction inputs (1x –10 to +10V, 1x –10 to +10V/4-20mA selectable) Analogue Outputs 2 multifunction outputs (-10 to +10V/4-20mA selectable) Pulse Train Input 1 multifunction pulse train input (0 to 32kHz) Pulse Train Output 1 multifunction pulse train output (o to 32kHz) RS-422/485 standard, MEMOBUS protocol

17. YASKAWA Mechatronics Solutions Varispeed G7 General Features Varispeed G7 – General Features Control Method Sine wave PWM V/F, V/f with PG, Open Loop Vector 1 and 2, Closed Loop Vector Starting Torque 150% at 0.3Hz in OLV2, 150% at 0.0Hz in CLV Speed Control Range 1:200 in OLV2, 1:1000 in CLV Speed Control Accuracy ± 0.2% in OLV 1 and 2, ± 0.02% in CLV Torque Accuracy ± 5% Frequency Control Range 0.0 to 400Hz Overload Capability 150% rated output for 1 minute, 200% for 0.5 sec Braking Torque Approx. 20% (approx. 125% with braking resistor) Build in braking chopper for models of 15kW and below Main Control Functions Momentary power loss restart, Speed search, Over-/undertorque detection, 17-step speed reference, 3 Autotuning methods, Cooling fan On/Off control, Slip Compensation, Torque compensation, Jump Frequency, HSB high slip braking, PID control (with PID sleep and soft start function), Energy saving control, MEMOBUS communications, Fault retry, Torque control, Constant copy function, etc. Protective Functions Motor overload protection, Inverter overload/overcurrent protection, Over-/ undervoltage detection, Cooling fin overheat detection, Stall prevention, Ground fault detection, Phase loss detection, Momentary power loss detection, etc.

18. YASKAWA Mechatronics Solutions Varispeed G7 Varispeed G7 – Easy To Make Exclusive DriveWorksEZ makes it possible to develop application specified functions very easily Graphical block based programming (much easier than CASE) Programming possible using operator keypad or PC configuration tool Huge application software will be available (e.g. winder, crane, etc.) Software Tool – DriveWorksEZ

19. YASKAWA Mechatronics Solutions Varispeed G7 With G7 Yaskawa again plays the role of a forerunner in drive market by introducing 3-Level technology to 400V inverter class G7 meets global specifications G7 has low effect on environment (e.g. peripheral devices) G7 solves common 400V class inverter problems (e.g. leakage currents etc.) G7 offers maximum control performance G7 is user friendly and easy to handle G7 is easily adaptable to specific machine requirements using DriveWorksEZ software G7 covers all fields, from low up to high performance application Varispeed G7 – The Solution Summary