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EETE MAY 2014

POWER design Significant ROI, fewer service calls Planmeca, the American manufacturer of dental imaging equipment, found a 60% reduction in service calls after it integrated Powervar’s power conditioning equipment into its dental imaging units. Fig. 2: Powervar’s power conditioner. Previously, the company’s customers were experiencing repeated equipment failures. Understandably, this was frustrating for staff and patients alike. The problem actually lay in the other equipment in the dental surgeries. Large compressors and vacuum systems created noise pollution in the power supply that caused slow degradation of components in the imaging units. Eventually, these components would fail, causing equipment failure. Planmeca initially thought their existing power management solutions were enough to protect their equipment. They had included UPS systems in their dental imaging units but this proved insufficient to protect their high-tech devices from poor quality power. The result, a high number of hardware failures, The Powervar’s UPS selection and demo tool. was costing Planmeca 6% of the total cost of the product through service calls. Integrating power conditioning solutions in their imaging equipment reduced this by 70%. In real terms, this equated to a return-on-investment of US$7,650,000 over the 1,200 units installed per year. This example shows that existing power management solutions might not always be enough to protect sensitive and critical equipment. The best power conditioning solution will provide all the benefits of individual power management components, without any of the negative consequences. It can save users and manufacturers time and money by ensuring equipment receives clean, continuous power. Smallest conduction cooled power supply focuses on LED lighting SL Power Electronics has introduced a single output, conduction cooled, wide temperature range LED power supply that provides 130 watts of energy efficient power at 90 percent efficiency in an ultra-compact 3 x 5 x 1.3 inch package. The LB130 is a single output power supply that is ideal for high intensity entertainment applications such as stage lighting and theatre control systems due to the ability to operate efficiently in extreme temperature conditions and tight spaces. The LB130 is designed to operate from -40°C to 70°C providing optimum thermal performance. Delivering 130 watts at 70°C ambient, the LB130 power supply is the smallest in the industry featuring conduction cooling that eliminates space and associated costs needed for fans. Meeting EN55015 standard for Electro Magnetic Compatibility (EMC) immunity and Class B Conducted EMI, the LB130 does not require an external Electromagnetic Interference (EMI) module. In addition, the power supply can turn on at -40°C, eliminating the need for a costly heating element. SL Power Electronics www.slpower.com Surge protection against 10,000A on an 8/20 μS waveform Bourns has added the Model 1840 surge protective device (SPD) for signal and data line applications, a heavy-duty, multi-stage protector designed to safeguard sensitive electronic circuits and components from damaging surge voltages and currents. The new model features extremely fast response and low clamping voltages. The Bourns Model 1840 supports working voltages of 5, 12 and 24 volts, and may be used directly with RS- 232, RS-422, RS-423 and RS-485 standard EIA interfaces as well as with 4-20 mA and 50 mA instrumentation loops. Bourns’ solid-state, third stage protection device works by intercepting the leading edge of a surge within a sub-nanosecond response time. Within micro-seconds thereafter, a primary stage, three-electrode common-chambered Gas Discharge Tube (GDT) activates and crowbars the majority of the surge energy to ground. The new model also utilizes Bourns TBU High-Speed Protector (HSP) technology as a key second stage. Bourns www.bourns.com 30 Electronic Engineering Times Europe May 2014 www.electronics-eetimes.com


EETE MAY 2014
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