Elmo's gold servo drives support a wide voltage range for various applications, from 10VDC to 800VDC and 30VAC to 530VAC, with specific configurations for efficiency in high current drives. The document discusses the importance of power supply standards and suggests using a shared DC bus for systems with multiple axes, emphasizing its benefits in efficiency, cost, and resource utilization. Additionally, it highlights considerations for selecting voltage based on motor needs and application constraints, advocating for direct-to-mains solutions when feasible.

1. One Solution Any Application
ANY Voltage

2. 2
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

5. 5
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

6. 6
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