Passive Components Blog
No Result
View All Result
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Phillips Medisize Launches TheraVolt Medical Connectors

    The Connector Industry is Undergoing Transformation

    TDK Presents Various Large-Size Ferrite Cores for Industrial Applications

    KYOCERA AVX Releases T1 Industrial Single-Pair Ethernet Connectors

    Würth Elektronik Opens Branch in South Africa

    Comparative display of a grain size and domain structure; b free energy; c P-E loops after high-entropy ceramics (HECs) and PGS design. source: Nature Communications  ISSN 2041-1723

    Researchers Propose Novel MLCC Dielectric Design to Increase Energy Storage Capacity

    Stackpole Unveils 1W High Power Density Current Sense Chip Resistor

    Bourns Releases New 150C Shielded Power Inductors

    iNRCORE Releases New Range of 1KW HiRel Planar Transformers

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Understanding Inductor Dot Markings and Their Application in LTspice

    Accelerating Full Bridge LLC Resonant Converter Design with Frenetic AI

    Understanding Switched Capacitor Converters

    Coupled Inductors Circuit Model and Examples of its Applications

    Inductor Resonances and its Impact to EMI

    Highly Reliable Flex Rigid PCBs, Würth Elektronik Webinar

    Causes of Oscillations in Flyback Converters

    How to design a 60W Flyback Transformer

    Modeling and Simulation of Leakage Inductance

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Circuit Protection Devices
    • electro-mechanical news
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • inter-connect news
    • Market & Supply Chain
    • Market Insights
    • Medical
    • Modelling and Simulation
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors News
    • Resistors
    • RF & Microwave
    • Telecommunication
    • Weekly Digest

    Phillips Medisize Launches TheraVolt Medical Connectors

    The Connector Industry is Undergoing Transformation

    TDK Presents Various Large-Size Ferrite Cores for Industrial Applications

    KYOCERA AVX Releases T1 Industrial Single-Pair Ethernet Connectors

    Würth Elektronik Opens Branch in South Africa

    Comparative display of a grain size and domain structure; b free energy; c P-E loops after high-entropy ceramics (HECs) and PGS design. source: Nature Communications  ISSN 2041-1723

    Researchers Propose Novel MLCC Dielectric Design to Increase Energy Storage Capacity

    Stackpole Unveils 1W High Power Density Current Sense Chip Resistor

    Bourns Releases New 150C Shielded Power Inductors

    iNRCORE Releases New Range of 1KW HiRel Planar Transformers

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Circuit Protection Video
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Inter-Connect Video
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos

    Understanding Inductor Dot Markings and Their Application in LTspice

    Accelerating Full Bridge LLC Resonant Converter Design with Frenetic AI

    Understanding Switched Capacitor Converters

    Coupled Inductors Circuit Model and Examples of its Applications

    Inductor Resonances and its Impact to EMI

    Highly Reliable Flex Rigid PCBs, Würth Elektronik Webinar

    Causes of Oscillations in Flyback Converters

    How to design a 60W Flyback Transformer

    Modeling and Simulation of Leakage Inductance

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Suppliers
    • Who is Who
  • Events
No Result
View All Result
Passive Components Blog
No Result
View All Result

Cressall Resistor liquid cooling boosts 3.3kV medium voltage loads

3.5.2018
Reading Time: 3 mins read
A A

source: Engineerlive news

David Atkins explains where the need for water cooling is paramount in slashing resistor footprint in industrial and marine applications

RelatedPosts

Phillips Medisize Launches TheraVolt Medical Connectors

The Connector Industry is Undergoing Transformation

TDK Presents Various Large-Size Ferrite Cores for Industrial Applications

In motor driven applications like cranes, lifts, hoists and conveyors, air cooled resistors are common, but in medium voltage, high power applications liquid cooling wins out. A medium voltage drive running off a 3.3kV supply to turn a 500kW motor will put a severe heating load on the application’s power transistors – hence the need for water cooling.

The new EV2 advanced water cooled modular resistor range for low and medium voltage applications is especially designed to function in severe environments, like the ones marine systems have to function in. This patented design encapsulates and completely separates the resistor elements from the coolant.

Water cooling

If 1MW or more of heat needs to be dissipated, direct water cooling makes more sense. A typical 1MW fresh water-cooled brake resistor for marine use is basically a 10 foot tube with large heating elements similar to those found in common household kettles.

The braking electricity that is being regenerated powers these elements. Most ships have a chilled water system, which circulates cool water throughout the vessel, used for both air conditioning and equipment cooling.

There is also a sea water variant with construction and ratings similar to the fresh water designs, but with titanium-sheathed elements in higher-grade stainless steel vessels, suitable for continuous duty in hot sea water.

The problem is that heating elements cannot be used here at an operating voltage of much above 1.5kV, whereas medium voltage drives will typically use a 3.3kV supply.

Cressall’s EV2 resistor is not limited by this restriction. This is a 25kW unit available as a single unit or as a block with a common cable box attached to 250kW braking power input using a common water supply.

Cold water comes in one end and hot water comes out the other. The EV2 has the advantage of higher operating voltage, lower weight and compactness, and is therefore ideal for marine applications.

Over the past 10 years shaft-driven shipboard mechanical power transmission has been increasingly replaced by electrical power.

For example, both the Royal Navy Type 45 destroyer and the Queen Elizabeth carrier are electrically driven. The prime mover is used solely for generating electricity, which is then distributed to various motors, including those driving the propeller shaft(s), and other consumer loads.

All-electric ship design

The logic behind all-electric ship design that is two-fold. Firstly, ship layout – a large motor does not need to be in the middle of the ship, which is better used as prime passenger and cargo space. Secondly – energy efficiency.

Traditional ships could have up to four diesel engines located mid-ship running at low power under normal operating circumstances. This often made them inefficient.

By using smaller diesel engines together with a couple of gas turbines, the right number of prime movers can be fired up to suit power demand, whether it is a fully-laden oil tanker afloat at sea or stationary at port.

In drilling or cable-laying vessels, where anything up to a mile of cable has to be paid out over the side during passage, the weight of the cable is so massive, that the drive motor has to reverse its function from motor to generator, in order to brake the cable reel.

Air cooled resistors have heating elements enclosed within a fan cooled cabinet. This makes them suitable for deck mounting, often on anti-vibration mounts.

An important benefit from using an electric drive is that reliable systems of regenerative and dynamic braking are available to complement or replace traditional mechanical braking systems. The advantages of electric braking include control, reliability, mechanical simplicity, weight saving and, in certain cases, the opportunity to make use of the regenerated braking energy.

David Atkins is projects director at Cressall Resistors.

Related

Recent Posts

TDK Presents Various Large-Size Ferrite Cores for Industrial Applications

25.7.2025
3

Stackpole Unveils 1W High Power Density Current Sense Chip Resistor

24.7.2025
10

Bourns Releases New 150C Shielded Power Inductors

24.7.2025
10

iNRCORE Releases New Range of 1KW HiRel Planar Transformers

24.7.2025
14

Vishay Releases Industrial-Grade 3/8 Square Single-Turn Cermet Trimmer

23.7.2025
3

July 2025 Interconnect, Passives and Electromechanical Components Market Insights

23.7.2025
37

Modelithics Library Expands with 120 New Models

22.7.2025
4

Exxelia Offers High-Q RF Microwave Capacitors for High Reliability Applications

21.7.2025
26

Premo Releases PLC Transformer for EV and Smart Grid Applications

21.7.2025
8

Rubycon Extends Capacitance of Polymer Hybrid Aluminum Capacitors

16.7.2025
67

Upcoming Events

Jul 29
16:00 - 17:00 CEST

Impact of Elevated Voltage and Temperature on Molded Power Inductors in DC/DC converters

View Calendar

Popular Posts

  • Buck Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Boost Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • Flyback Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • LLC Resonant Converter Design and Calculation

    0 shares
    Share 0 Tweet 0
  • What is a Dielectric Constant and DF of Plastic Materials?

    4 shares
    Share 4 Tweet 0
  • Dual Active Bridge (DAB) Topology Explained

    0 shares
    Share 0 Tweet 0
  • Ripple Current and its Effects on the Performance of Capacitors

    3 shares
    Share 3 Tweet 0
  • How to Design an Inductor

    0 shares
    Share 0 Tweet 0
  • MLCC Case Sizes Standards Explained

    0 shares
    Share 0 Tweet 0
  • MLCC and Ceramic Capacitors

    0 shares
    Share 0 Tweet 0

Newsletter Subscription

 

Passive Components Blog

© EPCI - Leading Passive Components Educational and Information Site

  • Home
  • Privacy Policy
  • EPCI Membership & Advertisement
  • About

No Result
View All Result
  • Home
  • Knowledge Blog
  • Premium Suppliers

© EPCI - Leading Passive Components Educational and Information Site

This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.
Go to mobile version