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Vonroll

Ana­ly­tics lab

It’s about detail and precision

Accu­ra­cy at the core

As a ser­vice pro­vi­der for our rese­arch depart­ment and for our cus­to­mers, the ana­ly­ti­cal labo­ra­to­ry forms the indis­pensable back­bone for suc­cess­ful rese­arch and deve­lo­p­ment. We gua­ran­tee the effi­ci­ent deve­lo­p­ment and qua­li­ty con­trol of pro­ducts and raw mate­ri­als. Do you need sup­port in your qua­li­fi­ca­ti­on pro­grams? We pro­vi­de you with fin­dings that will help you get ahead.

Che­mi­cal ana­ly­ses are our life­b­lood in the labo­ra­to­ry. In addi­ti­on, we test mate­ri­als for phy­si­cal and electri­cal pro­per­ties, mecha­ni­cal strength as well as aging beha­vi­or accord­ing to glo­bal stan­dards. This com­bi­na­ti­on of metho­do­lo­gies enab­les top tech­no­lo­gi­cal performance.

Our modern ana­ly­ti­cal labo­ra­to­ry works clo­se­ly with the Von Roll Insti­tu­te and the Inno­va­ti­on Lab. It is con­nec­ted to all depart­ments along the ent­i­re value chain — from raw mate­ri­al purcha­sing to pro­duc­tion and cus­to­mer support.

Selec­ted methods from our 360° approach

Time- and tem­pe­ra­tu­re-depen­dent dif­fe­rence bet­ween the heat flows of the sam­ple and the refe­rence to deter­mi­ne mel­ting or crystal­liz­a­ti­on pro­ces­ses, as well as glass tran­si­ti­ons. DSC can also be used to mea­su­re spe­ci­fic heat capa­ci­ties and to moni­tor che­mi­cal reac­tions or other processes.

Tem­pe­ra­tu­re- and fre­quen­cy-depen­dent deter­mi­na­ti­on of vis­co­elastic (dam­ping) mate­ri­al pro­per­ties, main­ly of poly­me­ric mate­ri­als. DMA is the most accu­ra­te and most sen­si­ti­ve method for deter­mi­ning the glass tran­si­ti­on tem­pe­ra­tu­re of poly­mers. The method allows for the veri­fi­ca­ti­on of the curing or post-curing of reac­ti­ve resins.

Rheo­lo­gy is used to stu­dy the defor­ma­ti­on and flow beha­vi­or of mate­ri­als under the action of for­ces. Dilu­t­ed poly­mer solu­ti­ons as well as poly­mer melts and solid poly­mers can be mea­su­red. Their vis­co­si­ty and vis­co­elasti­ci­ty depend on the mecha­ni­cal load and the temperature.

TGA mea­su­res the chan­ge in mass of a sam­ple during defi­ned hea­ting, coo­ling, or a con­stant tem­pe­ra­tu­re. The decre­a­se (eva­po­ra­ti­on, decom­po­si­ti­on) or incre­a­se (oxi­da­ti­on) in weight and the tem­pe­ra­tu­re at which the weight chan­ge occurs pro­vi­des important infor­ma­ti­on about the com­po­si­ti­on of a substance.

TMA is used to mea­su­re dimen­sio­nal chan­ges of a sam­ple as a func­tion of tem­pe­ra­tu­re. Among other things, the method allows the deter­mi­na­ti­on of expan­si­on coef­fi­ci­ents and the glass tran­si­ti­on temperature.

In this method, the poly­mer mole­cu­les are sepa­ra­ted based on their hydro­dy­na­mic volu­me. Using cali­bra­ti­on stan­dards, the rela­ti­ve mole­cu­lar weights in the poly­mer sam­ple can be determined.

FT-IR is a power­ful method to ana­ly­ze the che­mi­cal com­po­si­ti­on of orga­nic sub­s­tan­ces. An IR spec­trum is recor­ded using mid-infra­red light (waven­um­ber: 4000–400 cm‑1 wav­elength 2.5–25 µm). The posi­ti­on and inten­si­ty of the trans­mis­si­on bands pro­vi­de infor­ma­ti­on about the infra­red acti­ve func­tio­n­al groups in the sam­ple and thus faci­li­ta­te the iden­ti­fi­ca­ti­on of the substance.

DEA is a method for stu­dy­ing the vis­co­si­ty and curing sta­te of durom­ers, adhe­si­ves, coa­tings, and com­po­si­tes by mea­su­ring chan­ges in their dielectric properties.

This test is used to deter­mi­ne the tacki­ness of fle­xi­ble imp­reg­na­ted mate­ri­als, such as insu­la­ting tapes. In this way, we ensu­re per­fect pro­cessa­bi­li­ty and opti­mal hand­ling for our customers.

Our offer — bene­fit from our know-how

Con­sul­ting

Tell us about your spe­ci­fic requi­re­ments for high and low vol­ta­ge insu­la­ti­on sys­tems. We will pro­po­se to you ful­ly tes­ted and tech­no­lo­gi­cal­ly advan­ced insu­la­ti­on systems.

Insu­la­ti­on trai­ning incl. e‑drive

In our trai­ning cour­ses, you will gain a detail­ed over­view of insu­la­ting mate­ri­als and sys­tems for rota­ting high-vol­ta­ge and low-vol­ta­ge machi­nes. Inclu­ded are also topics such as selec­tion, pro­ces­sing and tes­ting of insu­la­ti­on systems.

Spot­light

A look into the practice

Class H sys­tem of next generation

Gene­ra­tors will beco­me even more effi­ci­ent in the future thanks to our new Sami­c­abond system.

Top sto­ry wind

Coil shop

Von Roll is expan­ding the site in Ban­ga­lo­re into one of the most advan­ced cen­ters for the pro­duc­tion of insu­la­ted coils in India.

Press release

E‑Drive Test Lab 

Busy days in the eDri­ve Lab of our High-Vol­ta­ge Institute. 

Press release

110 years Dolph’s®

Foun­ded in 1910, our Dol­ph’s® brand recent­ly cele­bra­ted its 110th anni­ver­s­a­ry. Electri­cal Appa­ra­tus maga­zi­ne cove­r­ed it. Curious?

Read arti­cle