Noise and Impedance Effects, Inductive loads

FPS1000 Instruction Manual

3.7.3 Noise and Impedance Effects

To minimize the noise pickup or radiation, the load wires and remote sense wires should be twisted-pairs of the shortest possible length. Shielding of the sense leads may be necessary in high noise environments. Even if noise is not a concern, the load and remote sense wires should be twisted-pairs to reduce coupling between them, which might impact the stability of power supply. The sense leads should be separated from the power leads.

Twisting the load wires reduces the parasitic inductance of the cable which could produce high frequency voltage spikes at the load and the output of power supply because of current variation in the load itself. The impedance introduced between the power supply output and the load could make the ripple and noise at the load worse than the noise at the power supply rear panel output. Additional filtering with bypass capacitors at the load terminals may be required to bypass the high frequency load current.

3.7.4 Inductive loads

To prevent damage to the power supply from inductive kickback, a diode should be connected across the output. The diode voltage and current rating should be greater than the power supply maximum output voltage and current rating. Connect the cathode to the positive output and the anode to the negative output. Where positive load transients such as back EMF from a motor may occur, connect a surge suppressor across the output to protect the power supply. The breakdown voltage rating of the suppressor must be approximately 10% higher than the maximum output voltage of the power supply.

3.7.5 Making the load connections

!WARNING

Hazardous voltages may exist at the outputs and the load connections when using a power supply with a rated output greater than 40V. To protect personnel against accidental contact with hazardous voltages, ensure that the load and it's connections has no accessible live parts.

Ensure that the load wiring insulation rating is greater than or equal to the maximum output voltage of the power supply.

	3.7.6 Front panel controls and indicator
1	2	3	4	5
1	2		4	5

Fig. 3-1: FPS1000 front panel

1	2	3	4	6	5

1:Handle

2:DC OK green LED, on when the output voltage is above 80% +/- 5% of its rated value.

3:DC Fail red LED, on when the output voltage is lower than 80% +/- 5% of its rated value.

4:AC OK green LED, on when the input voltage is higher than 85Vrms

5:Lock/Unlock lever. Automatically locks the power supply to the FPS-S1U rack chassis when the FPS1000 power supply is inserted. Push the Lock/Unlock lever toward the power supply cooling fan to withdraw

the FPS1000 from the rack.

6:IEC320 AC inlet

Fig. 3-2: FPS1000/P front panel

FPS1000-32, FPS-S1U, FPS1000-48, FPS1000-12, FPS-T1U specifications

TDK has established itself as a leading innovator in power supply solutions with its range of FPS series products, specifically designed for various demanding applications. Among these, the FPS1000-24, FPS-T1U, FPS1000-12, FPS1000-48, and FPS-S1U models stand out due to their advanced features, robust technologies, and versatile characteristics.

The FPS1000-24, catering to a voltage output of 24V, is ideal for both industrial and commercial applications. It delivers a notable output power of 1000 watts while boasting high efficiency, making it a reliable option for systems that require consistent power with minimal energy loss. The model incorporates advanced protection features including over-voltage, over-current, and short-circuit protection, ensuring that connected devices are safeguarded against potential electrical faults.

Similarly, the FPS1000-12 offers a 12V output with equivalent power ratings, making it suitable for applications such as telecommunications and medical devices where stability and reliability are paramount. This model also emphasizes thermal management, utilizing integrated cooling technologies to maintain optimal performance even under demanding conditions.

The FPS1000-48 distinguishes itself with a 48V output, which is increasingly prevalent in high-density computing environments and server applications. With enhanced scalability, this model allows for multiple unit configurations to support higher load demands while maintaining exceptional efficiency levels.

In addition to the standard offerings, TDK’s FPS-T1U and FPS-S1U models provide intelligent power management solutions. The FPS-T1U, being a compact version, is tailored for space-constrained environments, ensuring high performance without compromising on size. It features built-in monitoring capabilities that allow users to track power usage and efficiency metrics in real-time.

The FPS-S1U is particularly notable for its modular design, enabling easy integration into various systems. This flexibility allows users to adapt the power supply to specific system requirements, enhancing functionality across diverse applications. Both models leverage cutting-edge technology to ensure low standby power consumption, reducing the overall energy footprint.

Overall, TDK’s FPS series exemplifies a commitment to quality, performance, and adaptability, making them ideal candidates for modern power supply needs across industries. With their comprehensive protection mechanisms, efficiency, and innovative designs, they stand as reliable choices for engineers and designers looking to optimize their systems.

TDK FPS-T1U, FPS1000-12 Noise and Impedance Effects, Inductive loads, Making the load connections

Models: FPS1000-32 FPS-S1U FPS1000-48 FPS1000-12 FPS-T1U FPS1000-24