When you have Elmo voltage capabilities, you can choose the optimum combination of motor windings and drive size to yield the operating voltage. Elmo’s Gold Servo drives support a very wide range of DC and AC voltages, from 10VDC to 800VDC and from 30VAC to 530VAC.

1. One Solution Any Application
ANY Voltage

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Any Voltage Elmo’s Gold Servo Drives support a large voltage range: from 10VDC to 800VDC from 30VAC to 530VAC They are divided into a few operating ranges and Elmo’s DC Bus offers the following: 10VDC -100VDC 40VDC- 200VDC 100VDC- 400VDC 200VDC - 800VDC

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Any Voltage
For non-standard, justified requests:
10VDC- 48VDC 10VDC- 60VDC These two are needed mainly for greater efficiency with very high current drives Why justified requests? Usually suits applications with special not standard needs

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Any Voltage
The Tambourine
A compact, direct-to-mains power supplies for servo applications,
up to 530 VAC
TAM
VP +
VN -
Elmo
Isolated Drive
TAM001A
-t°
U
AC2
-t°
-t°
U
U
AC1
AC3
PE
C.M.C
Three Phase
Mains AC network
VP +
VN -
Neutral (0)
Safety Regulations
Earth (PE)
Rshunt
PE
AC1
AC2
AC3
PE
For more about power supplies:
http://www.elmomc.com/products/servo-power-supplies.htm
http://www.elmomc.com/applications/Power-Supply-for-Servo-Applications.htm

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Any Voltage Power supplies for servo applications must have: adequate DC Bus sufficient power resources to drive the loads voltage variations within acceptable limits bi-directional energy flow high-frequency power handling

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Any Voltage Power supplies for servo applications must: meet safety standards comply with EMC, Immunity & Emission + limit and control the inrush current control & limit leakage currents withstand tough environmental requirements (vibrations, temperature, humidity, etc.)

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Any Voltage
Two basic topologies:
1. Shared DC Power Bus

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Any Voltage
Two basic topologies:
2. AC Common Power Bus

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Any Voltage
Elmo recommends a shared DC Bus in any application with a number of axes >2.
Advantages include:
Sharing the power Bus resources Regeneration sharing Sharing the safety, protections, EMI, etc.

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Any Voltage
The shared DC Bus yields a more powerful DC source for each drive more powerful, efficient and practical regeneration saves 5% - 8% of the power consumption reduces the amount of external, mandatory components (circuit breakers, contactors, filters, etc.) reduces space (for > 2 axis applications) decreases heat dissipation diminishes stress from the AC network cuts overall costs (for > 2 axis applications)

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Any Voltage
Single phase or 3 phases? Single phase is more cost effective Three phases are technically better as they provide more stability, have less ripple, more balanced network loading, etc. Up to a few KWs (2 KW- 3 KW) the single phase is a reasonable compromise Single phase neutral conductor must usually be limited to
<30 A - 40 A Single phase 230 VAC servo drives and motors cost less and are more common (especially in the Far East) than 400 VAC servo drives and motors

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Any Voltage
So, which voltage to choose?
The mandatory rule is that: The voltage must be able to satisfy the needs of the speed & torque/force Then select according to constraints or convenience

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Any Voltage
Which voltage to choose?
Constraints: The motor determines the voltage. In many cases, such as Direct Drive (linear or rotary), a very high voltage is needed to achieve speed and current requirements. The Bus of the application is given. For example: battery 24 VDC, 48 VDC machine’s Bus etc. A transformer should not be required

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Any Voltage
Which voltage to choose?
Convenience: The freedom to select. Given only the speed and torque/ force allows selecting the optimum combination of motor windings, drive’s size and thus the operating voltage. Massive multi-axis. For example: an application with 61 axis X 1.5 KW (a real case). The question is: what is more convenient ─ 100KW isolation transformer or direct-to-the- mains 3X400 VAC? For High power (>15 KW) the 3X400 VAC is much more convenient than any other voltage Bus.

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Any Voltage
Which voltage to choose?
Convenience: Working direct-to-the-mains is always more convenient and saves the need for an isolation transformer, but it’s not always better!
For more about power supplies:
http://www.elmomc.com/products/servo-power-supplies.htm
http://www.elmomc.com/applications/Power-Supply-for-Servo-Applications.htm

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Any Voltage
Gold Servo Drive Standard Compliance
Each DC input is independently compliant with: Safety standards UL508c IEC61800 UL60950 EMC standards IEC61800-3